Sec.  2.303   Other forms of identification of stations.

   (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.
   Class of station Identification, other than assigned call sign
   Aircraft (U.S. registry) telephone Registration number preceded by the type
   of the aircraft, or the radiotelephony designator of the aircraft operating
   agency followed by the flight identification number.
   Aircraft  (foreign registry) telephone Foreign registry identification
   consisting of five characters. This may be 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 Limited Coast (Radiotelephone) The
   approximate geographic location in a format approved by the Commission.
      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, forestry conservation, highway maintenance,
   local government, shipyard, land transportation, and aviation services Name
   of station licensee (in abbreviated form if practicable), or location of
   station, or name of city, area, or facility served. Individual stations may
   be   identified  by  additional  digits  following  the  more  general
   identification.
   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 rural radio Special mobile unit designation
   assigned by licensee or by assigned telephone number.
   Land mobile: Railroad radio service Name of railroad, train number, caboose
   number, engine number, or name of 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 pickup) Identification of associated
   broadcasting station.
   Broadcasting  (Emergency  Broadcast System) State and operational area
   identification.
   Broadcasting (aural STL and intercity relay) Call sign of the broadcasting
   station with which it is associated.
   Broadcasting (television auxiliary) Call sign of the TV broadcasting station
   with  which  it  is  licensed  as an auxiliary, or call sign of the TV
   broadcasting  station  whose  signals are being relayed, or by network
   identification.
   Broadcasting (television booster). Retransmission of the call sign of the
   primary station.
   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.

   (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]

Subpart E—Distress, Disaster, and Emergency Communications