LIST  OF  RADIO  STATION  CLASS  CODES

An  unofficial  list  for  use  by  DXers

This list is based on codes used by the ITU, US NTIA & FCC but is a modified form for use by DXers in the classification of radio stations.

TERRESTRIAL SERVICES
AT

AMATEUR
BC

BROADCASTING
EX

EXPERIMENTAL
FL

MOBILE
FX

FIXED
RG

RADIO- DETERMINATION
SM

METEOROLOGICAL AIDS
SS

SPECIAL
 SPACE SERVICES
EA

AMATEUR- SATELLITE
EB

BROADCASTING-
SATELLITE
EH

SPACE
 RESEARCH
EI

MOBILE-
SATELLITE
EC

FIXED-
SATELLITE
EF

RADIO- DETERMINATION- SATELLITE
EW

EARTH EXPLORATION- SATELLITE
EE

SPECIAL SPACE



ES

INTER- SATELLITE
ET

SPACE
OPERATION



RECEIVING STATIONS
RX

RA

RADIO ASTRONOMY

 TERRESTRIAL  RADIOCOMMUNICATION  SERVICES
 
STATION  CLASS  CODES
Land Stations are not intended for use for transmissions while in motion.

Mobile Stations are used for transmissions while in motion or during halts at unspecified points.

Multiplex Stations are stations that transmit two or more different transmissions simutaneously by the use of digital multiplexing, subcarriers or independent sidebands (excluding stereo stations or parallel streams of the same transmission - one analogue and one digital). A + suffix may be added to any code to indicate that it is a multiplex (examples : BC+, BT+, FC-O+, etc.).

Sub-channel Stations and Subsidiary Communication Stations are secondary stations that are part of a multiplex station. A + prefix may be added to any code to indicate that it is a subchannel or subsidiary communication (examples : +BC, +BT, +HR, +FX-P, etc.)

Repeater Stations are stations that rebroadcast the signal of another station on a different frequency. A /R prefix may be added to any code indicates that it is a repeater station.

Booster Stations are stations that rebroadcast the signal of another station on the same frequency. A /B prefix may be added to any code indicates that it is a booster station.

High Altitude Platform Stations are stations located on an object at an altitude of 20-50 km at a specified nominal fixed point relative to Earth. A /HP suffix added to any code indicates that it is a high altitude platform station.

Experimental Stations utilize radio waves in experiments with a view to development of science, equipment or technique. A EX/ suffix added to any code (except those of the amateur service) indicates that it is an experimental station. Experimental is also a specific service.

Class Code
Class of Station Definitions / Notes
Land Mobile
 
AMATEUR SERVICE A radiocommunication service for the purpose of self-training, intercommunication and technical investigation carried out by amateurs, that is, by duly authorized persons interested in radio technique solely with a personal aim and without pecuniary interest.
 AT  AR AMATEUR
A station used for the purpose of self-training, intercommunication and technical investigation carried out by amateurs, that is, by duly authorized persons interested in radio technique solely with a personal aim and without pecuniary interest.
 AT-R
 
AMATEUR CIVIL EMERGENCY
An amateur station used for civil defence communications.
 
 BROADCASTING SERVICE A radiocommunication service in which the transmissions are intended for direct reception by the general public. This service may include sound, television or other types of transmissions.
 -
BROADCASTING
A station whose transmissions are intended for direct reception by the general public.
 BC
SOUND BROADCASTING
A broadcasting station that transmits speech or music (radio).
 BC
Standard Broadcasting A sound broadcasting station whose transmissions are intended to be received within the frontier of a country or region (excluding FM broadcasting stations).
 BC-F
FM Broadcasting A sound broadcasting station that broadcasts in the FM frequency band whose transmissions are intended to be received within the frontier of a country or region.
 BC-I
International Broadcasting A sound broadcasting station whose transmissions are intended to be received in foreign countries.
 BC-P
Travelers' Information A sound broadcasting station that broadcasts information pertaining to traffic and road conditions, traffic hazard and traveler advisories, directions, availability of lodging, rest stops, and service stations, and descriptions of local points of interest.
 BT

TELEVISION BROADCASTING
A broadcasting station that transmits transient images (TV).
 BT-I
International Television Broadcasting A television broadcasting station whose transmissions are intended to be received in foreign countries, normally via satellite.
See SP for special stations providing meteorological information or press broadcasts. 
 
 EXPERIMENTAL SERVICE A radiocommunication service utilizing radio waves in experiments with a view to development of science or technique (excluding the amateur service AT).
 EX
 EX
EXPERIMENTAL
A station that utilizes radio waves in experiments with a view to development of science, equipment or technique.
See EX note for more options.
 
 FIXED SERVICE A radiocommunication service between specified fixed points (excluding special services SP and meteorological aids SM).
 FX

FIXED
A station, not capable of moving, that communicates with one or more stations similarly established.
 FX

Common Carrier Fixed A fixed station open to public correspondance or provides telecommunication services to remote locations where it is not feasible to provide them by wire or other means.
 FX-B

Standard Broadcast Studio-Transmitter Link A fixed station that transmits program material between the studio and the transmitter(s) of a standard broadcasting station, including transmitter-studio links (TSL).
 FX-D

Telecommand Fixed A fixed station that transmits signals to initiate, modify or terminate functions of equipment at a distance.
 FX-E
Telemetering Fixed A fixed station used for telemetering (such as automated meter reading).
 FX-F

FM Broadcast Studio-Transmitter Link A fixed station that transmits program material between the studio and the transmitter(s) of an FM broadcasting station, including transmitter-studio links (TSL).
 FX-I

International Fixed A fixed station that communicates with similar stations in foreign countries.
 FX-M

Broadcast Inter-City Relay A fixed station that transmits program material between two or more sound broadcasting stations.
 FX-N

Television Broadcast Inter-City Relay A fixed station that transmits program material between two or more television broadcasting stations, or from a local cable television transmission point to one or more receiving points.
 FX-O

Operational Fixed A fixed station, not open to public correspondence, operated by entities that provide their own radiocommunication facilities.
 FX-T

Television Broadcast Studio-Transmitter Link A fixed station that transmits program material between the studio and the transmitter(s) of a television broadcasting station, including transmitter-studio links (TSL) and cable television studio-headend links (SHL).
 FX-Y

Inter-agency Fixed A fixed station that is used for official public safety communications with similar stations in other public safety agencies.
 FX-Z

Police Fixed A fixed station that is used for official police communications with similar stations in other police agencies.
 CX
 
Maritime Fixed A fixed station that is primarily used for safety communications in a coastal area.
See SP for special stations providing meteorological information or press broadcasts. 
 
 Aeronautical Fixed Service
A fixed service provided primarily for the safety of air navigation and for the regular, efficient and economical operation of air transport.
 AX

AERONAUTICAL FIXED
A fixed station that is used for the provision of services related to aircraft flight safety.
 
 METEOROLOGICAL AIDS SERVICE A radiocommunication service used for meteorological (including hydrological) observations and Earth exploration.
 SM
 SA
METEOROLOGICAL AID
A station that performs meteorological (including hydrological) observations or exploration.
 SM
 
Meteorological Observing A meteorological aid station that is used for the automatic transmission of meteorological data.
 
 SA-R
Radiosonde A meteorological aid that is a probe usually carried on a free balloon, parachute, kite or aircraft, that automatically transmits meteorological data.
 SM-B
 
Radar Beacon Precipitation Gauge A meteorological aid station that uses transponder emissions for telemetering precipitation amounts.
 SM-D
 
Meteorological Radar A meteorological aid station that employs radar.
 SH
 
Hydrologic Observing
A meteorological aid station that is used for the automatic transmission of hydrologic data.
 SN
 
Sounder Network
A meteorological aid station in the form of an ionosphere sounder that is used for the realtime selection of frequencies for operational communication circuits.
 SP
 
Sounder Prediction
A meteorological aid station in the form of an ionosphere sounder that is used for realtime monitoring of upper atmospheric phenomena or to obtain data for the prediction of propagation conditions.
 OE
 OD
Oceanographic Data A meteorological aid station that uses radar to measure surface currents on the ocean, or whose emissions are used to telecommand an oceanographic data station located on a ship, buoy or other sensor platform.
See SP for special stations providing meteorological information or press broadcasts. 
 
MOBILE SERVICE A radiocommunication service between mobile and land stations, or between mobile stations (excluding special services SP).
 FL
 MO
LAND
A station not capable of moving that primarily communicates with mobile stations.
MO (MOBILE) : A station capable of moving, which is usually moving.
 FL-A
 
Agriculture Land A land station that is used in agricultural operations.
 FL-B
 
Business Land A land station that is used by a small business, philanthropic group, etc.
 FL-C
 
Mobile Telephone & Paging A land station that uses a combination of radio transmission and telephone switching to permit telecommunications to and from mobile users within a specified area.
 FL-D
 
Telecommand Land
A land station that transmits signals to initiate, modify or terminate functions of a mobile at a distance.
 FL-E
 
Telemetering Land
A land station that is used for telemetering.
 FL-F
 
Forest Products Land A land station that is used in tree logging, tree farming, or related woods operations.
 FL-G
 
Geological Land A land station that is used in mining activities.
 FL-M
 
Film & Video Production Land A land station that is used in the production of motion pictures or television programs.
 FL-P
 
Petroleum Land A land station that is used in the transporting by pipeline or production of petroleum or petroleum products.
 FL-R
 
Remote Pickup Broadcast Base
A land station that transmits program material from remote points of origination (including aircraft) to a broadcasting station for simutaneous or delayed broadcasting and for the transmission of orders pertaining to such programs.
 FL-S
 
Special Industrial Land A land station that is used in construction, fuel or ice delivery, or other miscellaneous industrial activities.
 FL-T
 
Telephone Maintenance Land A land station that is used in the provision and maintenance of telecommunications services.
 FL-U
 
Aeronautical Utility Land
A land station that is used for the control of ground vehicles and aircraft on the ground at aerodromes.
 FL-V
 
Civil Air Patrol Land A land station that is used for communications of a civil air patrol or similar search and rescue organization.
 FL-W
 
Power Land A land station that is used in the provision of electrical power, natural or manufactured gas, water, or steam by fixed wire or pipelines.
 FL-X
  Manufacturers Land A land station that is used in manufacturing activities.
 FL-Y
 
Relay Press Land A land station that is used in the production of a newspaper or in the operation of a press association.
 FL-Z
 
Shipyard Land
A land station that is used for communications with shipyard mobile stations.
 YL-" 
Trunked Land Network
A land station with multiple users, mainly industrial, on a shared network of frequencies with a digital control channel.
 
 Aeronautical Mobile Service A mobile service between aeronautical stations and aircraft stations, or between aircraft stations.
 FA
 MA AERONAUTICAL
A land station that primarily communicates with aircraft.
MA (AIRCRAFT) : A mobile station located on board an aircraft.
 FA

Enroute Aeronautical An aeronautical station that communicates with aircraft in flight or with other enroute aeronautical stations.
 FA-A

Aerodrome Advisory An aeronautical station that provides advisory communications with aircraft arriving or departing an uncontrolled aerodrome.
 FA-C

Aerodrome Control An aeronautical station that provides control and advisory communications with aircraft arriving or departing a controlled aerodrome.
 FA-D
 
Telecommand Aeronautical
An aeronautical station that transmits signals to initiate, modify or terminate functions of an aircraft at a distance.
 FA-E
 
Telemetering Aeronautical
An aeronautical station that is used for telemetering (such as in in flight testing).
 FA-M
 
Aerodrome Multicom
An aeronautical station, not open to public correspondance, that communicates with private aircraft.
 FA-O

Aeronautical Operational Control An aeronautical station, not open to public correspondence, operated by airlines to communicate with their fleet of aircraft.
 FA-S
 
Aeronautical Instructional
An aeronautical station that is used for communications pertaining to instructions to students or pilots while actually operating aircraft or engaged in soaring activities.
 FA-T
 
Flight Test
An aeronautical station that transmits essential communications in connection with the testing of aircraft, or major components thereof.
 FG
 
Off-route Aeronautical
An aeronautical station that communicates with aircraft primarily outside of civil air routes.
See SP for special stations providing meteorological information or press broadcasts. 
See FL-U for aeronautical utility stations, commonly known as "Ground". 
The following additional codes may be used for aircraft stations (MA) :
     
FW
Fixed Wing Aircraft
     
GS
Military or Naval Aircraft

HC
Helicopter

UM
Unmanned
 
Land Mobile ServiceA mobile service between base stations and land mobile stations, or between land mobile stations.
 FB
 ML
BASE
A land station that primarily communicates with land mobile stations.
ML (LAND MOBILE) : A mobile station capable of surface movement within the geographical limits of a country or continent.
 FB-A
 
Automobile Emergency Base A base station that dispatchs emergency road service vehicles for the purpose of providing assistance to disabled automotive vehicles used on streets or highways.
 FB-D
 
Telecommand Base
A base station that transmits transmission of signals to initiate, modify or terminate functions of a vehicle at a distance.
 FB-E
 
Telemetering Base
A base station that is used for telemetering (such as in train hot box detectors).
 FB-I
 
Inter-city Bus Base A base station that is used in connection with the transportation of passengers by bus between cities.
 FB-J
 
Highway Truck Base A base station that is used in connection with the transportation of freight by truck on routes outside metropolitan areas.
 FB-R
 
Railroad Base A base station that is used in the operation and maintenance of a railroad common carrier.
 
 ML-T
Television Pickup
A land mobile station that transmits television broadcasting of a temporary nature from remote points of origination to a television broadcasting station or cable television system.
 FB-U
 
Urban Transit Base A base station that is used in connection with the transportation of passengers, by bus or streetcar, within the confines of an urban area.
 FB-V
 
Urban Truck Base A base station that is used in connection with the transportation of freight by truck within a metropolitan area.
 FB-X
   Taxicab Base A base station that is used in the transportation facilities of a taxicab common carrier.
 YB-" 
Trunked Base Network
A base station with multiple users, mainly land transportation, on a shared network of frequencies with a digital control channel.
 
 Maritime Mobile Service A mobile service between coast stations and ship stations, or between ship stations, or between associated on-board communication stations; survival craft stations and emergency position-indicating radiobeacon stations may also participate in this service.
 FC
 MS COAST
A land station that primarily communicates with ships (including submarines).
MS (SHIP) : A mobile station located on board a vessel which is not permanently moored, other than a survival craft station or dedicated rescue vessel.
 FC

Public Coast A coast station open to public correspondance.
 FC-A
 
Maritime Support
A coast station that is used for communications pertaining to training personnel or to demonstrate, test and maintain equipment.
 FC-D
 
Telecommand Coast
A coast station that transmits signals to initiate, modify or terminate functions of a ship at a distance.
 FC-E
 
Telemetering Coast
A coast station that is used for telemetering.
 FC-O

Official Coast A coast station operated by a navy or coast guard that is used for official correspondence with its fleet of ships.
 FC-R

Limited Coast A coast station, not open to public correspondance, that serves the operational and business needs of ships.
 FC-U

Maritime Utility Coast A coast station, not open to public correspondance, that serves the operational and business needs of ships by communicating with readily portable stations on ships within a designated local area.
 FC-V

Private Coast A coast station, not open to public correspondence, that is operated by private agencies to communicate with their ships.
 DC
 
Coast Digital Selective Calling Watch
A coast station that participates in watch-keeping using digital selective calling techniques.
See SP for special stations providing meteorological information or press broadcasts. 
 Port Operations ServiceA maritime mobile service in or near a port in which messages are restricted to those relating to the operational handling, the movement and the safety of ships and, in emergency, to the safety of persons.
 FP
 MS PORT
A coast station that provides communications in or near a port, in locks, canals, or other waterways to ship stations.
 Ship Movement ServiceA maritime mobile service in which messages are restricted to those relating to the safe movement of ships.
 FT MS PILOT A coast station whose messages are restricted to those relating to the safe movement of ships.
The following additional codes may be used for ship stations (MS) :
   
CA
Cargo Ship
   
FV
Fishing Fleet

GS
Warship

GV
Official Service Ship

MM
Merchant Ship

NF
River Vessel

NS
Naval/Military Ship

OF
Offshore Ship

PA
Passenger Ship

PH
Fishing Vessel

PL
Pleasure Ship

S
Lifeboat

SV
Rescue Vessel
 
Safety ServiceA mobile service used permanently or temporarily for the safeguarding of human life and property.
 FS
 MO
SAFETY
A land station established solely for the safety or preservation of life and protection of property.
 FS
 
Safety of Life A safety station that provides communications essential to the alleviation of an emergency endangering life or property.
 FS-D
 
Telecommand Safety
A safety station that transmits signals to initiate, modify or terminate functions of a mobile at a distance.
 FS-E
 
Telemetering Safety
A safety station that is used for telemetering.
 FS-F
 
Fire
A safety station that provides communications for official fire activities.
 FS-G
 
State Guard A safety station that provides communications for official state guard activities, or those of other comparable civilian organizations.
 FS-H
 
Highway Maintenance A safety station that provides communications for official highway maintenance activities.
 FS-L
 
Local Government A safety station that provides communications for other miscellaneous local government activities.
 FS-M
 
Emergency Medical A safety station that provides communications for the delivery or rendition of emergency medical services for the provision of basic or advanced life support.
 FS-O
 
Forestry & Conservation  A safety station that provides communications for official forestry and conservation activities, including the prevention and suppression of forest fires.
 FS-P
 
Police A safety station that provides communications for official police or border protection activities.
 FS-R
 
Search & Rescue
A safety station that provides communications with mobiles or other search and rescue stations pertaining to search and rescue activities.
 FS-X
 
Disaster
A safety station that is authorized to provide essential communications or emergency management incident to or in connection with disasters or other incidents which involve loss of communications facilities normally available or which require the temporary establishment of communications facilities beyond those normally available.
 YS-"
 
Trunked Safety Network
A safety station with multiple users, mainly public safety, on a shared network of frequencies with a digital control channel.
 
 RADIODETERMINATION SERVICE A radiocommunication service for the purpose of the determination of the position, velocity and/or other characteristics of an object, or the obtaining of information relating to these parameters, by means of the propagation properties of radio waves.
 -

RADIODETERMINATION
A station that is used for the purpose of the determination of the position, velocity and/or other characteristics of an object, or the obtaining of information relating to these parameters, by means of the propagation properties of radio waves.
 
 Radionavigation ServiceA radiodetermination service for the purpose of navigation, including obstruction warning.
 RN
 NR
RADIONAVIGATION
A radiodetermination station that is used for the purpose of navigation, including obstruction warning.
 RN
 
Differential Global Navigation Satellite System A radionavigation station that transmits locally relevant integrity messages and pseudorange corrections to a global navigation satellite system-derived position for mobiles, and approach data for aircraft.
 RN-L

Long Range Navigation System
A radionavigation station that transmits synchronized pulses over long distances. Hyperbolic lines of position are determined by the measurement of the difference in the time of arrival of these pulses.
 RN-R
 
Radar A radionavigation station that utilizes radar.
 Aeronautical Radionavigation ServiceA radionavigation service intended for the benefit and for the safe operation of aircraft.
 AL
 AM
AERONAUTICAL RADIONAVIGATION
A radionavigation station intended for the benefit and for the safe operation of aircraft.
 AL
 
Non-directional Radiobeacon
An aeronautical radionavigation station intended for aircraft to determine its bearing or direction in relation to the radiobeacon station (includes compass locator stations).
 AL-A
 
Aeronautical Marker Beacon An aeronautical radionavigation station that radiates vertically a distinctive pattern for providing position information to aircraft while landing at an aerodrome or to mark a significant point on an air route.
 AL-C
 
Aeronautical Radar Beacon An aeronautical radionavigation station that employs a transmitter-receiver with a fixed navigational mark which, when triggered by a radar, automatically returns a distinctive signal which can appear on the display of the triggering radar, providing range, bearing and indentification information.
 AL-G
 
Glide Path An aeronautical radionavigation station that is used for vertical guidance embodied in an Instrument Landing System which indicates the vertical deviation of an aircraft from its optimum path of descent.
 AL-O
 
Omni-directional Range An aeronautical radionavigation station that transmits on an information wave according to a rotary directional pattern and an omni-directional reference wave, and by comparison allows direct indication of the bearing of that station from an aircraft. A tactical air navigation system station also provides distance information.
 AL-L
 
Instrument Landing System Localizer An aeronautical radionavigation station that is used for horizontal guidance embodied in an Instrument Landing System which indicates the horizontal deviation of an aircraft from its optimum path of descent along the axis of a runway.
 AL-T
 
Radionavigation Land Test An aeronautical radionavigation station that is used as a radionavigation calibration station for the transmission of essential information in connection with the testing and calibration of aircraft navigational aids, receiving equipment and interrogators at pre-determined surface locations.
 AL-V
 
Distance Measuring Equipment An aeronautical radionavigation station that determines the distance of an interrogator from a transponder by measuring the time of transmission to and from the transponer.
 AL-W
 
Microwave Landing System An aeronautical radionavigation station, operating in the microwave spectrum, that provides lateral and vertical guidance to aircraft, similar to an instrument landing system.
 Maritime Radionavigation ServiceA radionavigation service intended for the benefit and for the safe operation of ships.
 NL
 RM MARITIME RADIONAVIGATION
A radionavigation station intended for the benefit and for the safe operation of ships.
 NL-C
 
Radar Beacon A maritime radionavigation station that employs a transmitter-receiver with a fixed navigational mark which, when triggered by a radar, automatically returns a distinctive signal which can appear on the display of the triggering radar, providing range, bearing and indentification information.
 NL-R
 
Shore Radar A maritime radionavigation station that utilizes radar.
 AI

Automatic Identification System A radiolocation station that uses telemetry to provide coast or navigational hazard information, including identity, type, position, navigational status and other safety-related information automatically to other AIS stations.
 RC
 
Radiobeacon A maritime radionavigation station intended for ships to determine their bearing or direction in relation to the radiobeacon station.
 RG

Radio-direction Finding
A maritime radionavigation station that uses the reception of radio waves for the purpose of determining the direction of a ship or object.
 
 Radiolocation ServiceA radiodetermination service for the purposes other than those of radionavigation (excluding meteorological aids SM).
 LR
 MR
RADIOLOCATION
A radiodetermination station that is used for purposes other than radionavigation.
 LR-I
 
Industrial Radiolocation A radiolocation station that is used in geographical, geological, or geophysical activities.
 LR-N
 
Shore Radiolocation A radiolocation station that performs a radiolocation service for ships.
 LR-R
 
Radar A radiolocation station that uses a system based on the comparison of reference signals with radio signals reflected, or re-transmitted, from the position to be determined.
 LR-S
 
Surveillance Radar A radiolocation station that employs radar to display the presence of aircraft or ships within its range.
 LR-U

Aeronautical Universal Access A radiolocation station that uses a datalink system to provide automatic dependent surveillance, traffic information services, and flight information service broadcasts.
 LR-X
 
Shore Radiolocation Test A radiolocation station that is used solely for testing maritime radiodetermination apparatus incident to its manufacture, installation, repair, servicing, or maintenance.
 
 SPECIAL SERVICE
A radiocommunication service operated specially to meet the requirements of a particular service of general utility not open to public correspondance; such as time signals, regular meteorological reports, notices to mariners, press messages for general reception, calibrated frequencies, emissions for scientific purposes, etc.
 BM

METEOROLOGICAL BROADCAST
A special station that broadcasts meteorological bulletins for the general public on a regular basis.
 BM-A

Aeronautical Broadcast A special station that broadcasts meteorological bulletins for aircraft on a regular basis.
 BM-C

Maritime Broadcast A special station that broadcasts meteorological bulletins for ships on a regular basis (excluding MSI broadcasts).
 GO

GEOPHYSICAL BROADCAST
A special station that broadcasts geophysical data bulletins (ursigrams) on a regular basis.
 IF

MARITIME SAFETY INFORMATION
A special station that broadcasts navigational and meteorological warnings and urgent information on a regular basis to ships by means of narrow-band direct-printing techniques.
 IX
AGRICULTURAL MARKET INFORMATION FIXED
A special station, operating in the fixed service, that broadcasts agricultural market information on a regular basis.
 MD

MEDICAL ADVICE
A special station used for the broadcasting of epidemilogical bulletins or the transmitting of medical consultations by radio.
 MX

METEOROLOGICAL INFORMATION FIXED
A special station, operating in the fixed service, that broadcasts meteorological reports on a regular basis.
 NA

NOTICES TO NAVIGATORS BROADCAST
A special station that broadcasts notices to navigators on a regular basis (excluding MSI broadcasts).
 PX

PRESS TRANSMISSION FIXED
A special station, operating in the fixed service, that broadcasts press messages for general reception on a regular basis.
 
 Standard Frequency & Time Signal ServiceA special service for scientific, technical and other purposes providing the transmission of specified frequencies and/or time signals of stated high precision intended for general reception.
 SS

STANDARD FREQUENCY
A special station used for scientific, technical and other purposes providing the transmission of specified frequencies of stated high precision (normally 20 kHz or 2.5, 5, 10, 15, 20 or 25 MHz) intended for general reception.
 HR

TIME SIGNAL
A special station that transmits time signals of stated high precision intended for general reception.
 
 OTHER

 CB

CITIZENS' BAND A station intended for short-distance personal or business communications (including general mobile stations).
 CC

RADIO CONTROL A station intended for short-distance control of remote objects or devices, or radio signalling.
 IS

INDUSTRIAL, SCIENTIFIC OR MEDICAL EQUIPMENT Equipment or applicances designed to generate and use locally radio-frequency energy for industrial, scientific, medical, domestic or similar purposes (including industrial heating, medical diathermy, ultrasonic, consumer, and magnetic resonance equipment).
 LP

LOW POWER AUXILIARY A station intended to transmit over distances of 100 metres or less, such as wireless microphones, cue and control communications, and synchronization of TV camera signals.
 U

UNWANTED EMISSIONS Spurious & out-of-band emissions.
 XX

PIRATE A station whose transmissions are unauthorized.
 ZZ

UNKNOWN A station whose purpose is unknown.

  RECEIVING STATIONS
 RADIO  STATION  CLASS  CODES
Land Class of Station
Definitions / Notes
 
 FR RECEIVING
Terrestrial station used for reception only.
 TP
SPACE RECEIVING
Space station used for reception only.
 
 Radio Astronomy Service A service involving the use of astronomy based on the reception of radio waves of cosmic origin.
 RA RADIO ASTRONOMY
A receiving station involving the use of astronomy based on the reception of radio waves of cosmic origin.

 SPACE  RADIOCOMMUNICATION  SERVICES
 RADIO  STATION  CLASS  CODES
Earth Stations are located either on the Earth's surface or within the major portion of the Earth's atmosphere (less than 50 km above the Earth's surface) and intended for communication with one or more space stations; or with one or more stations of the same kind by means of one or more reflecting satellites or other objects in space.

Mobile Earth Stations are located either on the Earth's surface or within the major portion of the Earth's atmosphere and intended for communication with one or more space stations; or with one or more stations of the same kind by means of one or more reflecting satellites or other objects in space; while in motion or during halts at unspecified points.

Space Stations are located on an object which is beyond, is intended to go beyond, or has been beyond, the major portion of the Earth's atmosphere (more than 50 km above the Earth's surface).

Space Telecommand Stations are used for the transmission of signals to a space station to initiate, modify or terminate functions of equipment on an associated space object, including the space station. A TD/UD/ED suffix added to any code indicates a telecommand station. Space Telecommand is also a specific service.

Space Telemetering Stations use telemetry for the transmission from a space station of results of measurements made in a spacecraft, including those relating to the functioning of the spacecraft. A TR/UR/ER suffix added to any code indicates a telemetering station. Space Telemetry is also a specific service.

Space Tracking Stations are used to determine the orbit, velocity or instantaneous postion of an object in space by means of radiodetermination, excluding primary radar, for the purpose of following the movement of the object. A TK/UK/EK suffix added to any code indicates a tracking station. Space tracking is also a specific service.

Earth Mobile Earth
Space Class of Station
Definitions / Notes
 
AMATEUR-SATELLITE SERVICE A radiocommunication service using space stations on earth satellites for the purpose of self-training, intercommunication and technical investigation carried out by amateurs, that is, by duly authorized persons interested in radio technique solely with a personal aim and without pecuniary interest.
 TA
 EA AMATEUR EARTH / SPACE A space station used for the purpose of self-training, intercommunication and technical investigation carried out by amateurs, that is, by duly authorized persons interested in radio technique solely with a personal aim and without pecuniary interest.
 
BROADCASTING-SATELLITE SERVICEA radiocommunication service in which signals transmitted or retransmitted by space stations are intended for direct reception by the general public.
 UB

 EB RADIO BROADCASTING SPACE A space station used for broadcasting sound.
 UV

 EV TELEVISION BROADCASTING SPACE A space station used for broadcasting television.
 
EARTH EXPLORATION-SATELLITE SERVICEA radiocommunication service between earth stations and one or more space stations, which may include links between space stations, in which information relating to the characteristics of the Earth and its natural phenomena including data relating to the state of the environment is obtained from active sensors or passive sensors on earth satellites; similar information is collected from airborne or Earth-based platforms; such information may be distributed to earth stations within the system concerned;  platform interrogation may be included. This service may also include feeder links necessary for its operation.
 TW
 UW
 EW
EARTH EXPLORATION EARTH / SPACE A space station in which information relating to the characteristics of the Earth and its natural phenomena including data relating to the state of the environment is obtained from active sensors or passive sensors on Earth satellites.
 
Meteorological-Satellite ServiceAn Earth exploration-satellite service for meteorological purposes.
 TM
 UM
 EM
METEOROLOGICAL EARTH / SPACE
An Earth exploration space station used for meteorological purposes.
 
FIXED-SATELLITE SERVICEA radiocommunication service between earth stations at specified fixed points when one or more satellites are used, including feeder links for other space radiocommunication services.
 TC
 UC
 EC
FIXED EARTH / SPACE A space station that communicates with earth stations at specified fixed points.
 
 UF
 
EARTH STATION IN MOTION A mobile earth station that communicates with a geostationary satellite orbit station.
 
 UG
 
UNMANNED AIRCRAFT A mobile earth station on board an unmanned aircraft that communicates with a space station of a geostationary-satellite network for unmanned aerial system control and non-payload communications links.
 
INTER-SATELLITE SERVICE A radiocommunication service providing links between artificial earth satellites.
 
 
 ES
INTER-SATELLITE
A space station located on an artificial earth satellite that links to another artificial earth satellite.
 
MOBILE-SATELLITE SERVICE A radiocommunication service between mobile earth stations and one or more space stations, or between space stations used by this service; or between mobile earth stations by means of one or more space stations. Emergency position-indicating radiobeacons are also part of this service.
 VA
 UA
 EI
MOBILE SPACE
 A space station that communicates with mobile earth stations or with other space stations used by the mobile-satellite service.
 UA (
MOBILE EARTH) : A mobile earth station that communicates with space stations or with other mobile earth stations by means of one or more space stations.
 
 TE 
EMERGENCY POSITION-INDICATING RADIO BEACON A mobile earth station intended to facilitate search and rescue operations.
 
Aeronautical Mobile-Satellite Service A mobile-satellite service in which mobile earth stations are located on board aircraft.
 TB
 TJ
 EJ
AERONAUTICAL SPACE
 A space station that communicates with aircraft or with other space stations used by the mobile-satellite service.
 
TJ (AIRCRAFT EARTH) : An aircraft station that communicates with space stations or with other aircraft stations by means of one or more space stations.
 
Land Mobile-Satellite Service A mobile-satellite service in which mobile earth stations are located on land.
 TY
 TU
 EU
BASE SPACE
 A space station that communicates with land mobile stations or with other space stations used by the mobile-satellite service.
 
TU (LAND MOBILE EARTH) : A land mobile station that communicates with space stations or with other land mobile stations by means of one or more space stations.
 
Maritime Mobile-Satellite Service A mobile-satellite service in which mobile earth stations are located on board ships.
 TI
 TG
 EG
COAST EARTH
 A space station that communicates with ships or with other space stations used by the mobile-satellite service.
 
TG (SHIP EARTH) : A ship station that communicates with space stations or with other ship ststions by means of one or more space stations.
 CS
 
 PUBLIC COAST EARTH
 A coast earth station open to public correspondance.
 
RADIODETERMINATION-SATELLITE SERVICEA radiocommunication service for the purpose of radiodetermination involving the use of one or more space stations. 
 TF
 TL
 EF
RADIODETERMINATION SPACE
 A space station used for the purpose of radiodetermination.
 
 
 GN
GLOBAL NAVIGATION SATELLITE SYSTEM
 A radiodetermination space station used for the purpose of radiodetermination (such as GPS).
 
Radionavigation-Satellite ServiceA radiodetermination-satellite service used for the purpose of radionavigation.  
 TN
 UN
 EN
RADIONAVIGATION SPACE
 A radiodetermination space station used for the purpose of radionavigation.
Aeronautical Radionavigation-Satellite ServiceA radionavigation-satellite service in which earth stations are located on board aircraft.
 TZ
 TO
 EO
AERONAUTICAL RADIONAVIGATION SPACE
 A radionavigation space station whose transmissions are used on board aircraft.
Maritime Radionavigation-Satellite ServiceA radionavigation-satellite service in which earth stations are located on board ships.
 TX
 TQ
 EQ
MARITIME RADIONAVIGATION SPACE
 A radionavigation space station whose transmissions are used on board ships.
 
SPACE OPERATION SERVICEA radiocommunication service concerned exclusively with the operation of spacecraft, in particular - space tracking, space telemetry and space telecommand.
 TT
 UT
 ET
SPACE OPERATION
A space station used during the operation of spacecraft, in particular - space tracking, space telemetry and space telecommand.
 TD
 UD
 ED
SPACE TELECOMMAND
A space operation space station used for the transmission of signals to a space station to initiate, modify or terminate functions of equipment on an associated space object, including the space station.




See ED note for more options.
 TR
 UR
 ER
SPACE TELEMETERING
A space operation space station using telemetry for the transmission from a space station of results of measurements made in a spacecraft, including those relating to the functioning of the spacecraft.




See ER note for more options.
 TK
 UK
 EK
SPACE TRACKING
A space operation space station used for determination of the orbit, velocity or instantaneous position of an object in space by means of radiodetermination, excluding primary radar, for the purpose of following the movement of the object.




See EK note for more options.
 
 SP
SPACECRAFT A space operation space station on a vehicle which is intended to go beyond the major portion of the Earth's atmosphere.
 
SPACE RESEARCH SERVICEA radiocommunication service in which spacecraft or other objects in space are used for scientific or technological research purposes.
 TH
 UH
 EH
SPACE RESEARCH
A space station used for communications with spacecraft or other objects in space are used for scientific or technological research purposes.
 
SPECIAL SPACE SERVICE
A radiocommunication service, not otherwise defined in this Section, carried on exclusively for specific needs of general utility, and not open to public correspondence.
 
 
 -
 
 
 
Standard Frequency & Time Signal-Satellite ServiceA radiocommunication service using space stations on earth satellites for scientific, technical and other purposes, providing the transmission of specified frequencies, time signals, or both, of stated high precision intended for general reception. 
 UE

 EE
STANDARD FREQUENCY SPACE
A special space station used to transmit specified frequencies of stated high precision (normally 400.1 MHz) intended for general reception.
 UY

 EY TIME SIGNAL SPACE
A special space station used to transmit time signals of stated high precision intended for general reception.


 Record of Changes
2017-01-27 
 Major update (total revision). Inclusion of Special Services.
2014-03-22 
 Aeronautical marker beacons changed from ALZ to ALM.

Maintained by William R. Hepburn ©2017. This list is in no way is meant to represent official usage.