Invalid Call Sign Requests

Last updated Monday, April 28, 2025 5:48:05 AM (Arizona)
Monday, April 28, 2025 12:48:05 PM (UTC)

Applications

Invalid Call Signs

This page shows the FCC guidelines for calls which are not available for requesting on an FCC application followed by the invalid call signs which have been requested in the last month and the rule they are in violation of.

The following call signs are not available for assignment and therefore any request for call signs in the following categories are invalid and will be denied.

  1. KA2AA-KA9ZZ, KC4AAA-KC4AAF, KC4USA-KC4USZ, KG4AA-KG4ZZ, KC6AA-KC6ZZ, KL9KAA- KL9KHZ, KX6AA-KX6ZZ;
  2. Any call sign having the letters SOS or QRA-QUZ as the suffix;
  3. Any call sign having the letters AM-AZ as the prefix (these prefixes are assigned to other countries by the ITU);
  4. Any 2-by-3 format call sign having the letter X as the first letter of the suffix;
  5. Any 2-by-3 format call sign having the letters AF, KF, NF, or WF as the prefix and the letters EMA as the suffix (U.S Government FEMA stations);
  6. Any 2-by-3 format call sign having the letters AA-AL as the prefix;
  7. Any 2-by-3 format call sign having the letters NA-NZ as the prefix;
  8. Any 2-by-3 format call sign having the letters WC, WK, WM, WR, or WT as the prefix (Group X call signs);
  9. Any 2-by-3 format call sign having the letters KP, NP or WP as the prefix and the numeral 0, 6, 7, 8 or 9;
  10. Any 2-by-2 format call sign having the letters KP, NP or WP as the prefix and the numeral 0, 6, 7, 8 or 9;
  11. Any 2-by-1 format call sign having the letters KP, NP or WP as the prefix and the numeral 0, 6, 7, 8 or 9;
  12. Call signs having the single letter prefix (K, N or W), a single digit numeral 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 and a single letter suffix are reserved for the special event call sign system.
Call SignRule Violation
 A0KW Call does not fall within a valid group as per FCC Guidelines
 A0WW Call does not fall within a valid group as per FCC Guidelines
BIG DCall sign is incorrectly formatted as per FCC Guidelines
 D9APOCall does not fall within a valid group as per FCC Guidelines
 D9JNGCall does not fall within a valid group as per FCC Guidelines
 J9APOCall does not fall within a valid group as per FCC Guidelines
 J9DVOCall does not fall within a valid group as per FCC Guidelines
 J9JNGCall does not fall within a valid group as per FCC Guidelines
N66WCall sign is incorrectly formatted as per FCC Guidelines
NA7HPS7.  Any 2-by-3 format call sign having the letters NA-NZ as the prefix
NZ7HPS7.  Any 2-by-3 format call sign having the letters NA-NZ as the prefix
R0M0VCHCall sign is incorrectly formatted as per FCC Guidelines
R0MANVCall sign is incorrectly formatted as per FCC Guidelines
R0MVCHCall sign is incorrectly formatted as per FCC Guidelines
 R4DARCall does not fall within a valid group as per FCC Guidelines
RD3NEKCall does not fall within a valid group as per FCC Guidelines
RE3BELCall does not fall within a valid group as per FCC Guidelines
RENEGADECall sign is incorrectly formatted as per FCC Guidelines
RMN0VCHCall sign is incorrectly formatted as per FCC Guidelines
RMNOVCHCall sign is incorrectly formatted as per FCC Guidelines
ROMANOVICHCall sign is incorrectly formatted as per FCC Guidelines
W4ATERCall sign is incorrectly formatted as per FCC Guidelines