Free from Nexus Broadcast

Spare broadcast call signs

15,512 four-letter K and W call signs aren't held by any AM, FM, LPFM or TV station right now. Pick a prefix to see every one, then run your favorites through our free Call Sign Check.

Found one you like? Check it before you file.

The FCC's own call sign search only looks at broadcast stations. Our free Call Sign Check also looks at FCC ship licenses and shortwave stations, tells you if a call was just released or is changing hands, and explains the rule behind every answer.

Each box: the prefix and how many of its 676 combinations are spare.

K call signs: stations west of the Mississippi River

W call signs: stations east of the Mississippi River

Released in the last 60 days

Dropped by a station that changed its call sign or went off the air. Anyone can reserve them once the change is effective (FCC 98-324, paragraph 16).

KXTE KZLB KLSQ KVWG KMFR WBTK KCAF KIBL KWYU KUFA KBQQ KIBQ KQBQ WPLI WMON WWXL KQSX KVFR KQHM KGWT WAJP KOHM KPQG KXAM KHMJ KHMZ KEHM KAVL WLVP WXDR WTSD KCRQ KDAC KOWL WGOC KEVO WLLF WBTH WTYX WPOM WIME WGOP KCLW KUIK KMBS KBKG WYEJ WVMG WPBW KFTI WLLS WBNZ KBOQ WYRC KLDI WQAH KGNM

Before you file

A call that looks free can still be a problem: four-letter calls used by ships or other radio services aren't available to broadcast stations (47 CFR 73.3550(k)), K and W follow the Mississippi River (73.3550(e)), and a base call another station uses needs its consent (73.3550(h), (m)). Call Sign Check looks at all of that for any call in a second.

From the FCC's station, ship and shortwave records as of October 16, 2026, updated every morning. Not a product of the FCC.