47 C.F.R. Subpart D—Call Signs and Other Forms of Identifying Radio Transmissions
Title 47 - Telecommunication
Authority: Secs. 4, 5, 303, 48 Stat., as amended, 1066, 1068, 1082; 47 U.S.C. 154, 155, 303.
Each station using radio frequencies shall identify its transmissions according to the procedures prescribed by the rules governing the class of station to which it belongs with a view to the elimination of harmful interference and the general enforcement of applicable radio treaties, conventions, regulations, arrangements, and agreements in force, and the enforcement of the Communications Act of 1934, as amended, and the Commission's rules. [34 FR 5104, Mar. 12, 1969] The table which follows indicates the composition and blocks of international call signs available for assignment when such call signs are required by the rules pertaining to particular classes of stations. When stations operating in two or more classes are authorized to the same licensee for the same location, the Commission may elect to assign a separate call sign to each station in a different class. (In addition to the U.S. call sign allocations listed below, call sign blocks AAA through AEZ and ALA through ALZ have been assigned to the Department of the Army; call sign block AFA through AKZ has been assigned to the Department of the Air Force; and call sign block NAA through NZZ has been assigned jointly to the Department of the Navy and the U.S. Coast. Guard. [34 FR 5104, Mar. 12, 1969; as amended at 54 50239, Dec. 5, 1989] Editorial Note: For (a) The following table indicates forms of identification which may be used in lieu of call signs by the specified classes of stations. Such recognized means of identification may be one or more of the following: name of station, location of station, operating agency, official registration mark, flight identification number, selective call number or signal, selective call identification number or signal, characteristic signal, characteristic of emission or other clearly distinguishing form of identification readily recognized internationally. Reference should be made to the appropriate part of the rules for complete information on identification procedures for each service. (b) Digital selective calls will be authorized by the Commission and will be formed by groups of numbers (0 through 9), however, the first digit must be other than 0, as follows: (1) Coast station identification number: 4 digits. (2) Ship station selective call number: 5 digits. (3) Predetermined group of ship stations: 5 digits. (c) Ship stations operating under a temporary operating authority shall identify by a call sign consisting of the letter “K” followed by the vessel's Federal or State registration number, or a call sign consisting of the letters “KUS” followed by the vessel's documentation number. However, if the vessel has no registration number or documentation number, the call sign shall consist of the name of the vessel and the name of the licensee as they appear on the station application form. [28 FR 12465, Nov. 22, 1963, as amended at 40 FR 57675, Dec. 11, 1975; 41 FR 44042, Oct. 6, 1976; 42 FR 31008, June 17, 1977; 44 FR 62284, Oct. 30, 1979]
Title 47: Telecommunication
PART 2—FREQUENCY ALLOCATIONS AND RADIO TREATY MATTERS; GENERAL RULES AND REGULATIONS
Subpart D—Call Signs and Other Forms of Identifying Radio Transmissions
§ 2.301 Station identification requirement.
§ 2.302 Call signs.
---------------------------------------------------------------------------------------------------------------- Class of station Composition of call sign Call sign blocks----------------------------------------------------------------------------------------------------------------Coast (Class I) except for coast 3 letters............................. KAA through KZZ. telephone in Alaska. WAA through WZZ.Coast (Classes II and III) and 3 letters, 3 digits................... KAA200 through KZZ999. maritime radio-determination. WAA200 through WZZ999.Coast telephone in Alaska....... 3 letters, 2 digits................... 3 letters, 3 digits (for stations KAA20 through KZZ99. assigned frequencies above 30 MHz). WAA20 through WZZ99. WZZ200 through WZZ999.Fixed........................... 3 letters, 2 digits................... KAA20 through KZZ99. 3 letters, 3 digits (for stations WAA20 through WZZ99. assigned frequencies above 30 MHz). WAA200 through WZZ999.Marine receiver test............ 3 letters, 3 digits (plus general KAA200 through KZZ999. geographic location when required). WAA200 through WZZ999.Ship telegraph.................. 4 letters \1\......................... KAAA through KZZZ. WAAA through WZZZ.Ship telephone.................. 2 letters, 4 digits, or 3 letters, 4 WA2000 through WZ9999, through digits \1\. WZZ9999.Ship telegraph plus telephone... 4 letters............................. KAAA through KZZZ. WAAA through WZZZ.Ship radar...................... Same as ship telephone and/or WA2000 through WZ9999, through telegraph call sign, or, if ship has WZZ9999. no telephone or telegraph: 2 letters, 4 digits, or 3 letters, 4 digits.Ship survival craft............. Call sign of the parent ship followed KAAA20 through KZZZ99. by 2 digits. WAAA20 through WZZZ99.Cable-repair ship marker buoy... Call sign of the parent ship followed by the letters ``BT'' and the identifying number of the buoy.Marine utility.................. 2 letters, 4 digits................... KA2000 through KZ9999.Shipyard mobile................. 2 letters, 4 digits................... KA2000 through KZ9999.Aircraft telegraph.............. 5 letters............................. KAAAA through KZZZZ. WAAAA through WZZZZ.Aircraft telegraph and telephone 5 letters \2\......................... KAAAA through KZZZZ. WAAAA through WZZZZ.Aircraft telephone.............. 5 letters \2\ (whenever a call sign is KAAAA through KZZZZ. assigned). WAAAA through WZZZZ.Aircraft survival craft......... Whenever a call sign \2\ is assigned, call sign of the parent aircraft followed by a single digit other than 0 or 1.Aeronautical.................... 3 letters, 1 digit \2\................ KAA2 through KZZ9. WAA2 through WZZ9.Land mobile (base).............. 3 letters, 3 digits................... KAA200 through KZZ999. WAA200 through WZZ999Land mobile (mobile telegraph).. 4 letters, 1 digit.................... KAAA2 through KZZZ9. WAAA2 through WZZZ9.Land mobile (mobile telephone).. 2 letters, 4 digits................... KA2000 through KZ9999. WA2000 through WZ9999Broadcasting (standard)......... 4 letters \3\ (plus location of KAAA through KZZZ. station). WAAA through WZZZ.Broadcasting (FM)............... 4 letters (plus location of station).. KAAA through KZZZ. WAAA through WZZZ.Broadcasting with suffix ``FM''. 6 letters \3\ (plus location of KAAA-FM through KZZZ--FM. station). WAAA-FM through WZZZ-FM.Broadcasting (television)....... 4 letters (plus location of station).. KAAA through KZZZ. WAAA through WZZZ.Broadcasting with suffix ``TV''. 6 letters \3\ (plus location of KAAA-TV through KZZZ-TV. station). WAAA-TV through WZZ-TV.Television broadcast translator. 1 letter_output channel number_2 K02AA through K83ZZ. letters. W02AA through W83ZZ.Disaster station, except U.S. 4 letters, 1 digit.................... KAAA2 through KZZZ9. Government. WAAA2 through WZZZ9.Experimental (letter ``X'' 2 letters, 1 digit, 3 letters......... KA2XAA through KZ9XZZ. follows the digit). WA2XAA through WZ9XZZ.Amateur (letter ``X'' may not 1 letter, 1 digit, 1 letter \4\....... K1A through K0Z. follow digit). N1A through N0Z. W1A through W0Z.Amateur......................... 1 letter, 1 digit, 2 letters \4\...... K1AA through K0ZZ. N1AA through N0ZZ. W1AA through W0ZZ. Do............................. 1 letter, 1 digit, 3 letters \4\...... K1AAA through K0ZZZ. N1AAA through N0ZZZ. W1AAA through W0ZZZ. Do............................. 2 letters, 1 digit, 1 letter \4\...... AA1A through AI0Z. KA1A through KZ0Z. NA1A through NZ0Z. WA1A through WZ0Z. Do............................. 2 letters, 1 digit, 2 letters \4\..... AA1AA through AL0ZZ. KA1AA through KZ0ZZ. NA1AA through NZ0ZZ. WA1AA through WZ0ZZ.Amateur (letter ``X'' may not 2 letters, 1 digit, 3 letters \4\..... AA1AAA through AL0ZZZ. follow digit). KA1AAA through KZ0ZZZ. NA1AAA through NZ0ZZZ. WA1AAA through WZ0ZZZ.Standard frequency.............. ...................................... WWV, WWVB through WWVI, WWVL, WWVS.Personal radio.................. 3 letters, 4 digits, or 4 letters, 4 KAA0001 through KZZ9999, digits.. WAA0001 through WPZ9999, KAAA0001 through KZZZ9999.Personal radio, temporary permit 3 letters, 5 digits................... KAA00000 through KZZ99999.Personal radio in trust 1 letter, 4 digits.................... K0001 through K9999. territories..Business radio temporary permit. 2 letters, 7 digits................... WT plus local telephone number.Part 90 temporary permit........ 2 letters, 7 digits................... WT plus local telephone number.Part 90 conditional permit...... 2 letters, 7 digits................... WT plus local telephone number.General Mobile Radio Service, 2 letters, 7 digits................... WT plus business or residence temporary permit. telephone number.----------------------------------------------------------------------------------------------------------------Note: The symbol 0 indicates the digit zero.\1\ Ships with transmitter-equipped survival craft shall be assigned four letter call signs.\2\ See § 2.303.\3\ A 3 letter call sign now authorized for and in continuous use by a licensee of a standard broadcasting station may continue to be used by that station. The same exception applies also to frequency modulation and television broadcasting stations using 5 letter call signs consisting of 3 letters with the suffix ``FM'' or ``TV''.\4\ Plus other identifying data as may be specified.
§ 2.303 Other forms of identification of stations.
---------------------------------------------------------------------------------------------------------------- Class of station Identification, other than assigned call sign----------------------------------------------------------------------------------------------------------------Aircraft (U.S. registry) Registration number preceded by the type of the aircraft, or the telephone. radiotelephony designator of the aircraft operating agency followed by the flight identification number.Aircraft (foreign registry) Foreign registry identification consisting of five characters. This may be telephone. preceded by the radiotelephony designator of the aircraft operating agency or it may be preceded by the type of the aircraft.Aeronautical..................... Name of the city, area, or airdrome served together with such additional identification as may be required.Aircraft survival craft.......... Appropriate reference to parent aircraft, e.g., the air carrier parent aircraft flight number or identification, the aircraft registration number, the name of the aircraft manufacturer, the name of the aircraft owner, or any other pertinent information.Ship telegraph................... When an official call sign is not yet assigned: Complete name of the ship and name of licensee. On 156.65 MHz: Name of ship. Digital selective call.Ship telegraph................... Digital selective call.Public coast (radiotelephone) and The approximate geographic location in a format approved by the Commission. Limited Coast (Radiotelephone). Coast station identification number.Public coast (radiotelegraph).... Coast station identification number.Fixed............................ Geographic location. When an approved method of superimposed identification is used, QTT DE (abbreviated name of company or station).Fixed: Rural subscriber service.. Assigned telephone number.Land mobile: Public safety, Name of station licensee (in abbreviated form if practicable), or location of forestry conservation, highway station, or name of city, area, or facility served. Individual stations may maintenance, local government, be identified by additional digits following the more general shipyard, land transportation, identification. and aviation services.Land mobile: Industrial service.. Mobile unit cochannel with its base station: Unit identifier on file in the base station records. Mobile unit not cochannel with its base station: Unit identifier on file in the base station records and the assigned call sign of either the mobile or base station. Temporary base station: Unit designator in addition to base station identification.Land mobile: Domestic public and Special mobile unit designation assigned by licensee or by assigned telephone rural radio. number.Land mobile: Railroad radio Name of railroad, train number, caboose number, engine number, or name of service. fixed wayside station or such other number or name as may be specified for use of railroad employees to identify a specific fixed point or mobile unit. A railroad's abbreviated name or initial letters may be used where such are in general usage. Unit designators may be used in addition to the station identification to identify an individual unit or transmitter of a base station.Land mobile: Broadcasting (remote Identification of associated broadcasting station. pickup).Broadcasting (Emergency Broadcast State and operational area identification. System).Broadcasting (aural STL and Call sign of the broadcasting station with which it is associated. intercity relay).Broadcasting (television Call sign of the TV broadcasting station with which it is licensed as an auxiliary). auxiliary, or call sign of the TV broadcasting station whose signals are being relayed, or by network identification.Broadcasting (television Retransmission of the call sign of the primary station. booster)..Disaster station................. By radiotelephony: Name, location, or other designation of station when same as that of an associated station in some other service. Two or more separate units of a station operated at different locations are separately identified by the addition of a unit name, number, or other designation at the end of its authorized means of identification.----------------------------------------------------------------------------------------------------------------
