Invalid Calls 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.

  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
A0SCCall sign is incorrectly formatted as per FCC Guidelines
A1SCCall sign is incorrectly formatted as per FCC Guidelines
A3LMJCall sign is incorrectly formatted as per FCC Guidelines
A4RKCCall sign is incorrectly formatted as per FCC Guidelines
A5CGMCall sign is incorrectly formatted as per FCC Guidelines
A7GHCall sign is incorrectly formatted as per FCC Guidelines
A7LBCall sign is incorrectly formatted as per FCC Guidelines
A8JHNCall sign is incorrectly formatted as per FCC Guidelines
A9FBCall sign is incorrectly formatted as per FCC Guidelines
A9OOCall sign is incorrectly formatted as per FCC Guidelines
AE5CGM6.  Any 2-by-3 format call sign having the letters AA-AL as the prefix
AN7DF3.  Any call sign having the letters AM-AZ as the prefix (these prefixes are assigned to other countries by the ITU)
AT7BZ3.  Any call sign having the letters AM-AZ as the prefix (these prefixes are assigned to other countries by the ITU)
B4RKCCall sign is incorrectly formatted as per FCC Guidelines
C4RKCCall sign is incorrectly formatted as per FCC Guidelines
CO6DAYCall sign is incorrectly formatted as per FCC Guidelines
D7XXCall sign is incorrectly formatted as per FCC Guidelines
DY6CCCCall sign is incorrectly formatted as per FCC Guidelines
F4RKCCall sign is incorrectly formatted as per FCC Guidelines
G4RKCCall sign is incorrectly formatted as per FCC Guidelines
I4RKCCall sign is incorrectly formatted as per FCC Guidelines
J4RKCCall sign is incorrectly formatted as per FCC Guidelines
KA4CS1.  KA2AA-KA9ZZ, KC4AAA-KC4AAF, KC4USA-KC4USZ, KG4AA-KG4ZZ, KC6AA-KC6ZZ, KL9KAA- KL9KHZ, KX6AA-KX6ZZ
KA4LW1.  KA2AA-KA9ZZ, KC4AAA-KC4AAF, KC4USA-KC4USZ, KG4AA-KG4ZZ, KC6AA-KC6ZZ, KL9KAA- KL9KHZ, KX6AA-KX6ZZ
KA4RS1.  KA2AA-KA9ZZ, KC4AAA-KC4AAF, KC4USA-KC4USZ, KG4AA-KG4ZZ, KC6AA-KC6ZZ, KL9KAA- KL9KHZ, KX6AA-KX6ZZ
KA4TE1.  KA2AA-KA9ZZ, KC4AAA-KC4AAF, KC4USA-KC4USZ, KG4AA-KG4ZZ, KC6AA-KC6ZZ, KL9KAA- KL9KHZ, KX6AA-KX6ZZ
KA5AL1.  KA2AA-KA9ZZ, KC4AAA-KC4AAF, KC4USA-KC4USZ, KG4AA-KG4ZZ, KC6AA-KC6ZZ, KL9KAA- KL9KHZ, KX6AA-KX6ZZ
KA6RL1.  KA2AA-KA9ZZ, KC4AAA-KC4AAF, KC4USA-KC4USZ, KG4AA-KG4ZZ, KC6AA-KC6ZZ, KL9KAA- KL9KHZ, KX6AA-KX6ZZ
KD1XON4.  Any 2-by-3 format call sign having the letter X as the first letter of the suffix
KG4LW1.  KA2AA-KA9ZZ, KC4AAA-KC4AAF, KC4USA-KC4USZ, KG4AA-KG4ZZ, KC6AA-KC6ZZ, KL9KAA- KL9KHZ, KX6AA-KX6ZZ
KJ4XYZ4.  Any 2-by-3 format call sign having the letter X as the first letter of the suffix
KQ4XQW4.  Any 2-by-3 format call sign having the letter X as the first letter of the suffix
KQ4XTZ4.  Any 2-by-3 format call sign having the letter X as the first letter of the suffix
L4RKCCall sign is incorrectly formatted as per FCC Guidelines
M1MMSCall sign is incorrectly formatted as per FCC Guidelines
M2MMSCall sign is incorrectly formatted as per FCC Guidelines
N0QTR2.  Any call sign having the letters SOS or QRA-QUZ as the suffix
N5QST2.  Any call sign having the letters SOS or QRA-QUZ as the suffix
NA3HMT7.  Any 2-by-3 format call sign having the letters NA-NZ as the prefix
NB4CLW7.  Any 2-by-3 format call sign having the letters NA-NZ as the prefix
NC4CLW7.  Any 2-by-3 format call sign having the letters NA-NZ as the prefix
NO2ZMB7.  Any 2-by-3 format call sign having the letters NA-NZ as the prefix
NO4ZMB7.  Any 2-by-3 format call sign having the letters NA-NZ as the prefix
NR1DWI7.  Any 2-by-3 format call sign having the letters NA-NZ as the prefix
NR2DWI7.  Any 2-by-3 format call sign having the letters NA-NZ as the prefix
NS1AMA7.  Any 2-by-3 format call sign having the letters NA-NZ as the prefix
NS3TST7.  Any 2-by-3 format call sign having the letters NA-NZ as the prefix
R4RKCCall sign is incorrectly formatted as per FCC Guidelines
R6RHWCall sign is incorrectly formatted as per FCC Guidelines
S4RKCCall sign is incorrectly formatted as per FCC Guidelines
T0JKCall sign is incorrectly formatted as per FCC Guidelines
U4RKCCall sign is incorrectly formatted as per FCC Guidelines
W4A12.  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.
W4E12.  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.
W4F12.  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.
W4H12.  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.
W4K12.  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.
W4N12.  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.
W4U12.  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.
W4X12.  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.
WC6BBR8.  Any 2-by-3 format call sign having the letters WC, WK, WM, WR, or WT as the prefix (Group X call signs)
WR4CHS8.  Any 2-by-3 format call sign having the letters WC, WK, WM, WR, or WT as the prefix (Group X call signs)
WT5CCG8.  Any 2-by-3 format call sign having the letters WC, WK, WM, WR, or WT as the prefix (Group X call signs)
YD6BBBCall sign is incorrectly formatted as per FCC Guidelines