An  unofficial  list  for  use  by  DXers
Last Update 2021-01-27

This list of codes for classifying radio stations is mainly based on ITU and classic FCC codes, but is modified for DXers.

Public Safety
Industrial / Business
Common Carrier
Land Transportation
Standard Frequency & Time Signal

CODE Station Remarks.

 Aeronautical Service
FA Aeronautical Enroute Advisory Air-to-ground advisory with aircraft in flight, primarily below 18,000'.
FD Aeronautical Enroute Control Air-to-ground control with aircraft in flight, primarily above flight level 180 (FIR).
FG Aeronautical Off-Route Air-to-ground communications primarily outside of civil air routes (military).
FS Search & Rescue Includes civil air patrol.
AB Aeronautical Broadcast Regular or continuous broadcast of weather reports and/or flight information for aircraft (ATIS, AWOS, volmet, etc.), including studio-transmitter links and inter-city relays.
AC Aerodrome Control Control tower or advisory station, including ground control, approach, departure and clearance delivery, but excluding private advisory (unicom) stations .
AO Aeronautical Operational Control Airlines and private companies.
AU Aerodrome Advisory Unicom private advisory, flying school, soaring, flight test, aviation support, etc.
AX Aeronautical Fixed Point-to-point transmission of flight safety information.
UA Universal Access UAT.
MA Aircraft
EJ Aeronautical Mobile Satellite

 Broadcasting Service
BA Broadcast Auxiliary Used for cue and control or synchronization of TV cameras (normally accompanying a simulcast), wireless cameras or microphones (broadcast use only). Excludes STL, relay, feeder and remote pickup stations.
BC Radio Broadcasting Radio broadcasting station.
BR Remote Pickup Broadcast Remote pickup broadcast at a specified location or on a mobile.
BT Television Broadcasting TV broadcasting station.
BX International Feeder A feeder for a relay station in another country.
IR Inter-City Relay A relay for a rebroadcasting station in another city.
ST STL Studio-transmitter link, excluding inter-city and international relays.
EB Broadcasting Satellite
EV Television Broadcasting Satellite

Fixed Service
FX Fixed Point-to-point station (includes diplomatic stations, United Nations, international disaster relief agencies, etc.).
OX Operational Fixed Operational fixed link used in non-broadcast services.
PX Public Press Fixed Press broadcasts.

Radiotelephone Service
CA Air-Ground Radiotelephone For service in aircraft.
CC Common Carrier Paging One-way paging open to public subscribers.
CD Domestic Radiotelephone Includes rural and offshore radiotelephone.
CI International Radiotelephone (Obsolete)
CM Broadband
CP In-House Paging Private one-way paging. Does not include dispatch paging.
IM Mobile Telecommunications Includes cellular, IMT, PCS, etc.
YX Trunked SMR Specialized mobile radio for subscribed industrial, business and land transportation users.
MO Mobile Phone
EC Common Carrier Satellite

 Space Service
ME Space Station or Spacecraft 
EH Space Research Space stations conducting space research.
ET Space Operation Space stations operating spacecraft.
ED Space Telecommand
ER Space Telemetering
ES Inter-Satellite

 Amateur Service
AT Amateur
AR Amateur Civil Emergency
MH Amateur Mobile
EA Amateur Satellite

 Industrial & Business Service
BB Business Audio Public broadcast, announcement, auditory assistance or language translation services provided by a business.
IB Business Operations of a commercial business, philanthropic institution, school, church, or hospital.
IF Forest Industry Logging and woods products.
IP Petroleum Petroleum or natural gas production, prospecting or exploration, or pipeline repair.
IS Special Industrial Agriculture, construction, mining, patrol or repair of public utilities, petroleum industry support, or delivery of concrete, asphalt, fuel, or water by truck.
IT Telecommunications Maintenance
IV Film & Video Production Motion pictures or television programs, including drive-in audio.
IW Public Utility Electric power, natural gas, water, or steam.
IX Manufacturers
IY Relay Press Newspaper or press association.
YB Trunked Business Private system. See YX for commercial trunked systems.
YI Trunked Industrial Private system. See YX for commercial trunked systems.
MI Industrial/Business Mobile
EU Land Mobile Satellite

 Land Transportation Service
LA Automobile Emergency Garages, tow truck companies and auto clubs.
LK Highway Truck
LR Railroad
LS School Bus
LT Public Transit Includes urban rail transit and inter-city buses. Excludes sightseeing and special charter buses (code IB).
LX Taxicab
YL Trunked Land Transportation Owned and operated. See YX for commercial trunked systems.
ML Land Transportation Vehicle
EU Land Mobile Satellite

 Maritime Service
FC Public Coast Ship-to-shore, open to public correspondance.
FP Port Harbourmaster, port operations, etc.
FS Search and Rescue
FT Ship Movement Vessel traffic service (VTS), bridge station, etc.
FW Port / Ship Movement Combined FP / FT station.
AI Automatic Identification System AIS.
CO Official Coast Coast guard or naval operations, not open to public correspondance.
CR Limited Coast Ship-to-shore, not open to public correspondance (marinas, high seas internet, etc.)
CV Private Coast Ship-to-shore operations of a private agency (yacht clubs, fishing fleets, etc.)
DC DSC Watch Watch-keeping using DSC.
IF Navtex Broadcast Regular broadcast of maritime safety information using NBDP.
LH Lighthouse
MB Marine Broadcast Regular or continuous broadcast of meteorological information and/or notices to navigators for ships, including associated studio-transmitter links and inter-city relays. May include notices to navigators or press.
MD Medical Advice Medical advice for ships.
MS Ship
EG Maritime Mobile Satellite

 Oceanographic Service
OE Oceanographic Data Interrogation HF radar.

 Public Safety Service
FB Army Range control, etc.
PB Travelers' Information TIS, highway advisory radio (HAR), etc. Regular or continuous public safety information broadcast, including studio-transmitter links and inter-city relays.
PC Corrections Correctional facilities.
PF Fire
PG Government Other miscellaneous national or state government services.
PH Highway Maintenance
PL Local Government Emergency management or other miscellaneous or combined municipal services.
PM Emergency Medical EMS.
PO Forestry & Conservation Forestry conservation and firefighting, park, fish and game wardens, etc.
PP Police Includes all national, state and municipal law enforcement entities.
PS Special Emergency Combined PF / PM station, or a land rescue squad, beach or ski patrol, veterinarian, disaster relief station (Red Cross, etc.), or isolated establishment. (Use LS code for school bus dispatch).
YP Trunked Public Safety
MP Public Safety Mobile Includes aircraft when transmitting in a public safety band.
EU Land Mobile Satellite

 Radionavigation Service
DG DGPS Radiobeacon
RB Non-Directional Radiobeacon NDB.
RC Marine Radiobeacon ROBN.
RD Radar Beacon Racon.
RG Radio Direction-Finding DF.
RI Instrument Landing System ILS localizer, glide path, or 75 MHz marker beacon.
RM Microwave Landing System MLS.
RN Long Range Navigation Loran.
RO Omni-Directional Range VOR, VORTAC or Tacan.
RS Surveillance Radar For detecting the presence of aircraft or ships.
RT VOR Operational Test VOT.
RV Distance Measuring Equipment DME.
MR Mobile Radionavigation Driftnet buoys, etc.
EN Radionavigation Satellite
EO Aeronautical Radionavigation Satellite 
EQ Maritime Radionavigation Satellite

 Standard Frequency & Time Signal Service
HR Time Signal Time signal broadcasting on a non-standard frequency.
SC Synchronized Clock System
SS Standard Frequency & Time Signal
EE Standard Frequency Satellite
EY Time Signal Satellite

 Meteorological Service
MX Meteorological Fixed Broadcast Point-to-point broadcast of meteorological information and/or solar terrestrial conditions.
SM Radiosonde
WB Meteorological Broadcast Regular or continuous public broadcast of meteorological information and/or solar terrestrial conditions, including associated studio-transmitter links and inter-city relays.
WD Meteorological Radar
WX Meteorological or Hydrologic Meteorological or hydrologic observation station (excluding AWOS).
MW Meteorological Mobile
TM Meteorological or Hydrologic Earth Meteorological or hydrologic station that transmits its observations to a satellite.
EM Meteorological Satellite
EW Earth Exploration Satellite

 Experimental Service
EX Experimental
(X) Experimental Mobile

 Personal Service
ZA General Mobile GMRS, FRS (family radio) or MURS (multi-use radio).
ZC Radio Control Short range non-voice.
ZD CB Citizens band.
ZI ISM Industrial, scientific, medical, or domestic equipment or appliances.
ZL Low Power Short range ultra low power devices (non-broadcast wireless microphone or camera, TV interface, WAN, etc.).
MZ Personal Mobile Short range handheld, portable or automobile interface audio or video devices.

S Sounder HF ionospheric sounder used for the real-time selection of frequencies.
U Unwanted Emissions Spurious or out-of-band emission.
XX Pirate An iIlegal station.

 Record of Changes
 "BM" and "NA" codes combined into new code "MB".
 "NV" code merged into "CO".
 "RP" code changed to "BR". "MB" code combined with "BR".
 "WH" code changed to "WX".
 "WX" code changed to "WB".
 PB code - stipulation "in the standard broadcast bands" removed.
 "PS" code now includes a combined PF/PM dispatch station.
 "FW" code added.
 "PS" code now includes a combined PF/PM dispatch station.
 "LT" code definition expanded.
 New "OX" (Operational Fixed) code for non-broadcast links.
 "CX" (Common Carrier Fixed) code deleted and combined with "OX".
"FX" (Fixed) code term "international" deleted.
 New "PC" (Corrections) code separated from PP (Police) code.

This list is in no way is meant to represent official usage. Code definitions may differ from the official ITU and FCC versions.

Maintained by William R. Hepburn 2021.