Spare broadcast call signs
Available WM call signs
174 of the 676 WM four-letter combinations aren't held by any broadcast station. W calls go to stations east 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.
WM call signs at a glance
Of the 676 four-letter WM combinations, 502 belong to broadcast stations and 174 are spare.
Those 502 calls are used by 552 stations (a call can be shared across services, like KXXX and KXXX-FM):
- FM: 295
- AM: 127
- LPFM: 55
- Full-power TV: 50
- Low power TV: 13
- Class A TV: 12
WM stations on the air include WMAC (AM, Macon, GA), WMEK (FM, Kennebunkport, ME), WMHU (FM, Cold Brook, NY), WMLU (FM, Farmville, VA), WMPW (AM, Danville, VA), WMUN (AM, Muncie, IN).
The newest WM call: WMNW-LP, a new station's first call sign on March 6, 2026.
Among the spare ones: 1 released in the last 60 days, 19 used by a ship or shortwave station, 24 old ship calls whose license lapsed. Run any of them through Call Sign Check before you file.
Just released
All spare WM call signs
Just released Used by a ship or shortwave station: check before you file Old ship call (license lapsed)
WMAF WMAI WMAP WMAT WMBK WMBY WMCJ WMCK WMCS WMCU WMCY WMDK WMDL WMDP WMDQ WMDU WMDW WMDY WMDZ WMEO WMFI WMFK WMFW WMFX WMFY WMFZ WMGD WMHA WMHE WMHF WMHJ WMHL WMHM WMHO WMHP WMHV WMIF WMIG WMII WMIJ WMIP WMIU WMIV WMIW WMJE WMJG WMJN WMJS WMKA WMKF WMKH WMKN WMKQ WMKU WMLA WMLC WMLE WMLF WMLH WMLI WMLK WMLM WMLY WMMD WMMK WMMN WMMU WMMW WMND WMNE WMNK WMNL WMNO WMNQ WMNS WMNU WMOB WMOE WMOJ WMOL WMON WMPD WMPE WMPP WMPQ WMPU WMPY WMQB WMQC WMQD WMQE WMQG WMQH WMQI WMQJ WMQK WMQL WMQN WMQO WMQP WMQQ WMQU WMQW WMQX WMRJ WMRM WMRU WMSM WMSQ WMSX WMSY WMTF WMTP WMUE WMUF WMUI WMUJ WMUO WMUP WMUQ WMUT WMUX WMUY WMVD WMVF WMVO WMVU WMVZ WMWB WMWE WMWF WMWG WMWH WMWJ WMWL WMWM WMWN WMWO WMWP WMWQ WMWR WMWS WMWT WMWU WMWW WMWX WMWY WMWZ WMYF WMYG WMYH WMZA WMZC WMZD WMZE WMZF WMZG WMZH WMZI WMZJ WMZL WMZM WMZN WMZO WMZP WMZR WMZS WMZT WMZU WMZV WMZW WMZX WMZY WMZZ
← WL call signs All prefixes WN 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.