RadioQTH Invalid Call Signs Requested

Call Sign Availability

Invalid Call Sign Requests

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.

KA2AA-KA9ZZ, KC4AAA-KC4AAF, KC4USA-KC4USZ, KG4AA-KG4ZZ, KC6AA-KC6ZZ, KL9KAA- KL9KHZ, KX6AA-KX6ZZ;
Any call sign having the letters SOS or QRA-QUZ as the suffix;
Any call sign having the letters AM-AZ as the prefix (these prefixes are assigned to other countries by the ITU);
Any 2-by-3 format call sign having the letter X as the first letter of the suffix;
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);
Any 2-by-3 format call sign having the letters AA-AL as the prefix;
Any 2-by-3 format call sign having the letters NA-NZ as the prefix;
Any 2-by-3 format call sign having the letters WC, WK, WM, WR, or WT as the prefix (Group X call signs);
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;
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;
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;
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 Sign	Rule Violation
A0CWR	Call sign is incorrectly formatted as per FCC Guidelines
A0MCR	Call sign is incorrectly formatted as per FCC Guidelines
A1BSA	Call sign is incorrectly formatted as per FCC Guidelines
A1CE	Call sign is incorrectly formatted as per FCC Guidelines
A1CS	Call sign is incorrectly formatted as per FCC Guidelines
A1DVR	Call sign is incorrectly formatted as per FCC Guidelines
A1MB	Call sign is incorrectly formatted as per FCC Guidelines
A1RRR	Call sign is incorrectly formatted as per FCC Guidelines
A2BSA	Call sign is incorrectly formatted as per FCC Guidelines
A2DVR	Call sign is incorrectly formatted as per FCC Guidelines
A2GD	Call sign is incorrectly formatted as per FCC Guidelines
A3DVR	Call sign is incorrectly formatted as per FCC Guidelines
A3GL	Call sign is incorrectly formatted as per FCC Guidelines
A3TS	Call sign is incorrectly formatted as per FCC Guidelines
A4DVR	Call sign is incorrectly formatted as per FCC Guidelines
A4HB	Call sign is incorrectly formatted as per FCC Guidelines
A4JOE	Call sign is incorrectly formatted as per FCC Guidelines
A4LDS	Call sign is incorrectly formatted as per FCC Guidelines
A5BSA	Call sign is incorrectly formatted as per FCC Guidelines
A5DVR	Call sign is incorrectly formatted as per FCC Guidelines
A6BSA	Call sign is incorrectly formatted as per FCC Guidelines
A6DVR	Call sign is incorrectly formatted as per FCC Guidelines
A6PRC	Call sign is incorrectly formatted as per FCC Guidelines
A6RRR	Call sign is incorrectly formatted as per FCC Guidelines
A7DVR	Call sign is incorrectly formatted as per FCC Guidelines
A7SP	Call sign is incorrectly formatted as per FCC Guidelines
A8DVR	Call sign is incorrectly formatted as per FCC Guidelines
A9DVR	Call sign is incorrectly formatted as per FCC Guidelines
AA0JTC	6. Any 2-by-3 format call sign having the letters AA-AL as the prefix
AA4HWB	6. Any 2-by-3 format call sign having the letters AA-AL as the prefix
AA6BSA	6. Any 2-by-3 format call sign having the letters AA-AL as the prefix
AE6HMC	6. Any 2-by-3 format call sign having the letters AA-AL as the prefix
AM0LDS	3. Any call sign having the letters AM-AZ as the prefix (these prefixes are assigned to other countries by the ITU)
AM1B	3. Any call sign having the letters AM-AZ as the prefix (these prefixes are assigned to other countries by the ITU)
AM4GVN	3. Any call sign having the letters AM-AZ as the prefix (these prefixes are assigned to other countries by the ITU)
AM6BSA	3. Any call sign having the letters AM-AZ as the prefix (these prefixes are assigned to other countries by the ITU)
AN6BSA	3. Any call sign having the letters AM-AZ as the prefix (these prefixes are assigned to other countries by the ITU)
AO6BSA	3. Any call sign having the letters AM-AZ as the prefix (these prefixes are assigned to other countries by the ITU)
AP6BSA	3. Any call sign having the letters AM-AZ as the prefix (these prefixes are assigned to other countries by the ITU)
AR6BSA	3. Any call sign having the letters AM-AZ as the prefix (these prefixes are assigned to other countries by the ITU)
AT6L	3. Any call sign having the letters AM-AZ as the prefix (these prefixes are assigned to other countries by the ITU)
AX9JB	3. Any call sign having the letters AM-AZ as the prefix (these prefixes are assigned to other countries by the ITU)
AZ9JB	3. Any call sign having the letters AM-AZ as the prefix (these prefixes are assigned to other countries by the ITU)
ES4USA	Call sign is incorrectly formatted as per FCC Guidelines
I4KIM	Call sign is incorrectly formatted as per FCC Guidelines
K5QRN	2. Any call sign having the letters SOS or QRA-QUZ as the suffix
K5QSO	2. Any call sign having the letters SOS or QRA-QUZ as the suffix
KB1XYZ	4. Any 2-by-3 format call sign having the letter X as the first letter of the suffix
KB3XXX	4. Any 2-by-3 format call sign having the letter X as the first letter of the suffix
KB3XYL	4. Any 2-by-3 format call sign having the letter X as the first letter of the suffix
KB3XYZ	4. Any 2-by-3 format call sign having the letter X as the first letter of the suffix
MP8V	Call sign is incorrectly formatted as per FCC Guidelines
N5QSO	2. Any call sign having the letters SOS or QRA-QUZ as the suffix
N6QRP	2. Any call sign having the letters SOS or QRA-QUZ as the suffix
N6QSY	2. Any call sign having the letters SOS or QRA-QUZ as the suffix
NA4DDH	7. Any 2-by-3 format call sign having the letters NA-NZ as the prefix
NC4DDH	7. Any 2-by-3 format call sign having the letters NA-NZ as the prefix
NC9SVR	7. Any 2-by-3 format call sign having the letters NA-NZ as the prefix
NC9TOR	7. Any 2-by-3 format call sign having the letters NA-NZ as the prefix
NC9WRN	7. Any 2-by-3 format call sign having the letters NA-NZ as the prefix
NE4DDH	7. Any 2-by-3 format call sign having the letters NA-NZ as the prefix
NF4DDH	7. Any 2-by-3 format call sign having the letters NA-NZ as the prefix
NM4DDH	7. Any 2-by-3 format call sign having the letters NA-NZ as the prefix
NP4DDH	7. Any 2-by-3 format call sign having the letters NA-NZ as the prefix
NQ4DDH	7. Any 2-by-3 format call sign having the letters NA-NZ as the prefix
NT4DDH	7. Any 2-by-3 format call sign having the letters NA-NZ as the prefix
NX4DDH	7. Any 2-by-3 format call sign having the letters NA-NZ as the prefix
NZ4DDH	7. Any 2-by-3 format call sign having the letters NA-NZ as the prefix
P4KIM	Call sign is incorrectly formatted as per FCC Guidelines
R4KIM	Call sign is incorrectly formatted as per FCC Guidelines
R7JEN	Call sign is incorrectly formatted as per FCC Guidelines
WC4DDH	8. Any 2-by-3 format call sign having the letters WC, WK, WM, WR, or WT as the prefix (Group X call signs)
WC5DMK	8. Any 2-by-3 format call sign having the letters WC, WK, WM, WR, or WT as the prefix (Group X call signs)
WR4DDH	8. Any 2-by-3 format call sign having the letters WC, WK, WM, WR, or WT as the prefix (Group X call signs)
WR4EGL	8. Any 2-by-3 format call sign having the letters WC, WK, WM, WR, or WT as the prefix (Group X call signs)
WR5RWW	8. Any 2-by-3 format call sign having the letters WC, WK, WM, WR, or WT as the prefix (Group X call signs)
WR8EMA	8. Any 2-by-3 format call sign having the letters WC, WK, WM, WR, or WT as the prefix (Group X call signs)
WT4ATT	8. Any 2-by-3 format call sign having the letters WC, WK, WM, WR, or WT as the prefix (Group X call signs)
WT4DDH	8. Any 2-by-3 format call sign having the letters WC, WK, WM, WR, or WT as the prefix (Group X call signs)