Spare broadcast call signs
Available KB call signs
203 of the 676 KB four-letter combinations aren't held by any broadcast station. K calls go to stations west of the Mississippi River. Click any call to check it.
Spotted a call you want? Verify it before filing.
The call sign search the FCC offers covers broadcast stations only. Our free Call Sign Check adds shortwave stations and FCC ship licenses, flags a call that was recently released or is moving to a new owner, and gives the rule behind each result.
KB call signs at a glance
Of the 676 four-letter KB combinations, 473 belong to broadcast stations and 203 are spare.
Those 473 calls are used by 511 stations (a call can be shared across services, like KXXX and KXXX-FM):
- FM: 305
- AM: 94
- LPFM: 45
- Full-power TV: 30
- Low power TV: 29
- Class A TV: 8
KB stations on the air include KBAA (FM, Grass Valley, CA), KBEC (AM, Waxahachie, TX), KBIM (AM, Roswell, NM), KBMT (Full-power TV, Beaumont, TX), KBRK (AM, Brookings, SD), KBUQ (FM, Buckland, AK).
The latest KB call sign change: KRZD became KBOB on June 1, 2026.
Among the spare ones: 3 released in the last 60 days, 6 used by a ship or shortwave station, 7 old ship calls whose license lapsed. Run any of them through Call Sign Check before you file.
Just released
All spare KB call signs
Just released Used by a ship or shortwave station: check before you file Old ship call (license lapsed)
KBAD KBAF KBAG KBAL KBAN KBAO KBAU KBAW KBBA KBBE KBBH KBBJ KBBP KBCD KBCF KBCG KBCI KBCJ KBCP KBCW KBDF KBDQ KBDU KBDW KBED KBEG KBEH KBEO KBFJ KBFQ KBFR KBFU KBFV KBGC KBGD KBGF KBGG KBGH KBGI KBGJ KBGK KBGP KBGQ KBGW KBHA KBHD KBHF KBHK KBHO KBHV KBHX KBHY KBII KBIP KBIR KBIV KBIW KBIY KBJB KBJC KBJG KBJH KBJI KBJJ KBJK KBJL KBJN KBJO KBJP KBJU KBJV KBJW KBJY KBKA KBKD KBKE KBKG KBKH KBKJ KBKM KBKP KBKQ KBKT KBKU KBKX KBLH KBLI KBLM KBMA KBMB KBML KBMU KBMZ KBNB KBNC KBNE KBNQ KBOF KBOH KBOL KBOQ KBPB KBPC KBPD KBPE KBPF KBPJ KBPK KBPP KBPQ KBPV KBPZ KBQD KBQE KBQG KBQH KBQJ KBQK KBQM KBQN KBQO KBQP KBQQ KBQR KBQT KBQU KBQV KBQW KBQX KBQY KBQZ KBRM KBTB KBTH KBTJ KBTY KBTZ KBUD KBUI KBUJ KBUM KBUO KBUV KBVF KBVG KBVH KBVI KBVJ KBVL KBVN KBVQ KBVS KBVT KBVV KBVX KBVY KBWI KBWJ KBWK KBWL KBWM KBWO KBWP KBWQ KBWV KBWX KBWY KBWZ KBXA KBXD KBXF KBXH KBXJ KBXK KBXN KBXO KBXQ KBXV KBXW KBXZ KBYD KBYF KBYJ KBYK KBYL KBYM KBYP KBYQ KBYT KBYV KBYW KBYX KBYY KBZA KBZF KBZG KBZH KBZJ KBZL KBZP KBZV KBZW KBZX
← KA call signs All prefixes KC call signs →
Spare call signs by prefix
K call letters: west of the Mississippi River
- KA220
- KB203
- KC207
- KD354
- KE372
- KF366
- KG392
- KH343
- KI380
- KJ395
- KK356
- KL207
- KM284
- KN346
- KO334
- KP329
- KQ406
- KR187
- KS196
- KT209
- KU398
- KV359
- KW301
- KX365
- KY406
- KZ359
W call letters: east of the Mississippi River
- WA197
- WB176
- WC176
- WD310
- WE309
- WF314
- WG310
- WH263
- WI340
- WJ241
- WK133
- WL155
- WM174
- WN284
- WO380
- WP271
- WQ401
- WR147
- WS209
- WT242
- WU442
- WV311
- WW305
- WX376
- WY380
- WZ391
Spotted a call you want? Verify it before filing.
The call sign search the FCC offers covers broadcast stations only. Our free Call Sign Check adds shortwave stations and FCC ship licenses, flags a call that was recently released or is moving to a new owner, and gives the rule behind each result.
Current to October 16, 2026, drawn from FCC records for stations, ships and shortwave, with a fresh update each morning. Not an FCC product.