Spare broadcast call signs

Available WX call signs

376 of the 676 WX 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.

WX call signs at a glance

Of the 676 four-letter WX combinations, 300 belong to broadcast stations and 376 are spare.

Those 300 calls are used by 310 stations (a call can be shared across services, like KXXX and KXXX-FM):

FM: 166
LPFM: 60
AM: 46
Full-power TV: 19
Low power TV: 16
Class A TV: 3

WX stations on the air include WXAC (FM, Reading, PA), WXEF (FM, Effingham, IL), WXKG (AM, Atlanta, GA), WXMA (FM, Louisville, KY), WXQW (AM, Fairhope, AL), WXUR (FM, Herkimer, NY).

The newest WX call: WXPI-LP, a new station's first call sign on February 12, 2026.

Among the spare ones: 1 released in the last 60 days, 4 used by a ship or shortwave station, 22 old ship calls whose license lapsed. Run any of them through Call Sign Check before you file.

Just released

WXDR

All spare WX call signs

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

WXAA WXAB WXAD WXAE WXAH WXAI WXAJ WXAK WXAL WXAM WXAO WXAP WXAQ WXAR WXAS WXAT WXAU WXAW WXAY WXAZ WXBD WXBF WXBH WXBI WXBL WXBO WXBR WXBS WXBV WXBY WXBZ WXCA WXCD WXCE WXCF WXCG WXCJ WXCK WXCP WXCQ WXCU WXDA WXDB WXDD WXDF WXDH WXDI WXDK WXDL WXDN WXDO WXDP WXDQ WXDR WXDS WXDV WXDW WXDY WXDZ WXEA WXEB WXEG WXEH WXEJ WXEK WXEN WXEO WXEP WXEQ WXET WXEU WXEX WXEY WXFA WXFB WXFD WXFE WXFF WXFG WXFH WXFI WXFJ WXFK WXFN WXFO WXFP WXFQ WXFS WXFU WXFV WXFW WXFY WXFZ WXGB WXGC WXGD WXGE WXGF WXGG WXGH WXGJ WXGK WXGP WXGQ WXGS WXGU WXGV WXGW WXGX WXGY WXGZ WXHA WXHB WXHE WXHF WXHG WXHH WXHI WXHJ WXHK WXHN WXHO WXHP WXHS WXHU WXHV WXHW WXHX WXHY WXHZ WXIB WXID WXIE WXIF WXIG WXIH WXIJ WXIK WXIM WXIP WXIQ WXIU WXIW WXIY WXJA WXJD WXJE WXJF WXJG WXJH WXJI WXJJ WXJL WXJN WXJP WXJQ WXJR WXJS WXJT WXJU WXJV WXJW WXJX WXJY WXKA WXKF WXKH WXKJ WXKK WXKM WXKN WXKP WXKX WXMH WXMN WXMQ WXMS WXMU WXMV WXMY WXNB WXNF WXNG WXNH WXNI WXNJ WXNL WXNM WXNN WXNP WXNQ WXNX WXOA WXOB WXOC WXOE WXOG WXOI WXOM WXOO WXOP WXOQ WXOR WXOV WXOY WXOZ WXPA WXPC WXPE WXPF WXPG WXPO WXPQ WXPT WXPU WXPV WXPY WXPZ WXQB WXQC WXQD WXQE WXQF WXQG WXQH WXQI WXQJ WXQK WXQL WXQM WXQN WXQO WXQP WXQQ WXQS WXQT WXQU WXQV WXQX WXQY WXQZ WXRE WXRG WXRN WXRO WXSA WXSB WXSC WXSD WXSE WXSF WXSH WXSI WXSJ WXSK WXSN WXSO WXSQ WXSV WXSW WXSX WXSY WXSZ WXTD WXTE WXTO WXTT WXTW WXUA WXUB WXUC WXUD WXUE WXUF WXUG WXUH WXUI WXUJ WXUK WXUL WXUM WXUN WXUO WXUP WXUQ WXUU WXUV WXUW WXUX WXUY WXUZ WXVB WXVC WXVD WXVF WXVG WXVH WXVJ WXVL WXVN WXVP WXVQ WXVR WXVX WXVY WXVZ WXWA WXWB WXWC WXWD WXWE WXWF WXWG WXWH WXWI WXWJ WXWK WXWL WXWM WXWN WXWO WXWP WXWQ WXWR WXWT WXWU WXWV WXWW WXWY WXXD WXXE WXXG WXXH WXXJ WXXN WXXP WXXT WXXU WXXW WXXZ WXYA WXYD WXYE WXYF WXYH WXYI WXYJ WXYL WXYM WXYN WXYO WXYP WXYQ WXYU WXYV WXYW WXZA WXZB WXZD WXZE WXZF WXZG WXZH WXZI WXZJ WXZK WXZL WXZM WXZN WXZP WXZR WXZS WXZT WXZU WXZV WXZW

← WW call signs All prefixes WY call signs →

Spare call signs by prefix

K call letters: west of the Mississippi River

W call letters: east of the Mississippi River

Spotted a call you want? Verify it before filing.

Current to October 16, 2026, drawn from FCC records for stations, ships and shortwave, with a fresh update each morning. Not an FCC product.