Spare broadcast call signs

Available WO call signs

380 of the 676 WO 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.

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.

WO call signs at a glance

Of the 676 four-letter WO combinations, 296 belong to broadcast stations and 380 are spare.

Those 296 calls are used by 330 stations (a call can be shared across services, like KXXX and KXXX-FM):

FM: 165
AM: 69
LPFM: 44
Full-power TV: 20
Low power TV: 17
Class A TV: 15

WO stations on the air include WOAB (FM, Ozark, AL), WOEN (AM, Olean, NY), WOKA (AM, Douglas, GA), WOLZ (FM, Fort Myers, FL), WORM (AM, Savannah, TN), WOUB (AM, Athens, OH).

The latest WO call sign change: W28GA-D became WONK-LD on October 7, 2026.

Among the spare ones: 9 used by a ship or shortwave station, 21 old ship calls whose license lapsed. Run any of them through Call Sign Check before you file.

All spare WO call signs

Just released Used by a ship or shortwave station: check before you file Old ship call (license lapsed)

WOAA WOAC WOAE WOAF WOAG WOAJ WOAL WOAM WOAN WOAO WOAQ WOAT WOAU WOAV WOAW WOAX WOAZ WOBA WOBD WOBF WOBG WOBH WOBJ WOBK WOBP WOBQ WOBU WOBV WOBW WOBY WOBZ WOCF WOCH WOCI WOCP WOCU WOCY WOCZ WODD WODF WODG WODI WODJ WODL WODM WODO WODQ WODU WODV WODW WODX WOEA WOEB WOEC WOED WOEE WOEF WOEH WOEI WOEJ WOEK WOEM WOEO WOEP WOEQ WOER WOET WOEU WOEV WOEW WOEY WOFA WOFC WOFD WOFF WOFG WOFH WOFI WOFJ WOFK WOFO WOFP WOFQ WOFS WOFU WOFV WOFW WOFY WOFZ WOGD WOGE WOGF WOGH WOGI WOGN WOGP WOGQ WOGS WOGU WOGV WOGW WOGZ WOHB WOHD WOHE WOHG WOHH WOHN WOHQ WOHR WOHT WOHU WOHV WOHX WOHY WOIA WOIC WOID WOIE WOIF WOIG WOIH WOII WOIJ WOIK WOIM WOIN WOIP WOIQ WOIS WOIT WOIU WOIV WOIW WOIX WOIY WOJA WOJD WOJE WOJF WOJH WOJI WOJJ WOJK WOJM WOJN WOJP WOJQ WOJR WOJS WOJT WOJU WOJV WOJW WOJX WOJY WOKF WOKJ WOKP WOKU WOKX WOLJ WOLK WOLQ WOLU WOMA WOMD WOMF WOMH WOMJ WOMK WOML WOMM WOMO WOMQ WOMU WOMV WOMW WOMY WOMZ WONB WONF WONG WONI WONJ WONL WONM WONP WONR WONV WONX WONZ WOOB WOOE WOOI WOOJ WOOQ WOOR WOOU WOOV WOOW WOOX WOOY WOPB WOPD WOPE WOPF WOPH WOPJ WOPK WOPL WOPM WOPN WOPO WOPQ WOPS WOPU WOPV WOPY WOPZ WOQA WOQB WOQC WOQD WOQE WOQF WOQG WOQH WOQJ WOQK WOQL WOQM WOQN WOQO WOQP WOQQ WOQR WOQS WOQT WOQU WOQV WOQW WOQX WOQY WOQZ WORE WORF WORH WORJ WORN WORP WORR WORS WORU WORV WORY WOSD WOSG WOSI WOSJ WOSK WOSS WOSY WOSZ WOTA WOTD WOTG WOTI WOTK WOTN WOTO WOTP WOTQ WOTU WOTY WOTZ WOUA WOUD WOUE WOUF WOUI WOUJ WOUK WOUM WOUN WOUO WOUP WOUQ WOUS WOUT WOUU WOUV WOUW WOUY WOVB WOVC WOVD WOVF WOVG WOVH WOVJ WOVL WOVN WOVP WOVQ WOVR WOVS WOVT WOVW WOVX WOVY WOVZ WOWG WOWH WOWJ WOWM WOWP WOWS WOWU WOWV WOWX WOXA WOXB WOXC WOXE WOXG WOXH WOXJ WOXK WOXN WOXP WOXQ WOXS WOXT WOXU WOXV WOXW WOXZ WOYA WOYB WOYC WOYD WOYF WOYG WOYH WOYI WOYJ WOYL WOYM WOYN WOYO WOYP WOYQ WOYR WOYT WOYU WOYV WOYW WOYX WOYY WOYZ WOZA WOZB WOZC WOZD WOZE WOZF WOZG WOZH WOZJ WOZL WOZM WOZP WOZR WOZS WOZT WOZU WOZV WOZX WOZY

← WN call signs All prefixes WP call signs →

Spare call signs by prefix

K call signs: stations west of the Mississippi River

W call signs: stations east of the Mississippi River

Found one you like? Check it before you file.

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