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Spare broadcast call signs

Available KM call signs

284 of the 676 KM 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.

KM call signs at a glance

Of the 676 four-letter KM combinations, 392 belong to broadcast stations and 284 are spare.

Those 392 calls are used by 420 stations (a call can be shared across services, like KXXX and KXXX-FM):

  • FM: 249
  • AM: 71
  • Full-power TV: 38
  • LPFM: 29
  • Low power TV: 28
  • Class A TV: 5

KM stations on the air include KMAD (AM, Madill, OK), KMEN (FM, Mendota, CA), KMIX (FM, Tracy, CA), KMND (AM, Midland, TX), KMRS (AM, Morris, MN), KMVM (FM, Clarksville, AR).

The latest KM call sign change: KMBH-LD became KMHB-LD on August 26, 2026.

Among the spare ones: 2 released in the last 60 days, 6 used by a ship or shortwave station, 15 old ship calls whose license lapsed. Run any of them through Call Sign Check before you file.

Just released

KMFR KMBS

All spare KM call signs

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

KMAA KMAF KMAH KMAI KMAM KMAO KMAP KMAW KMBE KMBF KMBG KMBJ KMBK KMBP KMBS KMBU KMBW KMCF KMCG KMCW KMCZ KMDA KMDB KMDC KMDD KMDH KMDI KMDJ KMDK KMDM KMDN KMDP KMDQ KMDU KMDV KMDW KMEF KMEJ KMEK KMEP KMEQ KMEU KMEV KMEW KMEY KMFD KMFE KMFF KMFG KMFI KMFJ KMFK KMFL KMFM KMFN KMFO KMFP KMFQ KMFR KMFT KMFU KMFV KMFW KMFZ KMGB KMGD KMGF KMGQ KMGU KMGY KMHE KMHF KMHG KMHH KMHJ KMHM KMHN KMHP KMHQ KMHU KMHW KMHX KMHY KMHZ KMIB KMIE KMIF KMIG KMII KMIJ KMIM KMIP KMIU KMIV KMIW KMIY KMJA KMJE KMJG KMJH KMJL KMJN KMJO KMJP KMJR KMJS KMJT KMJU KMJW KMJY KMKA KMKC KMKD KMKG KMKH KMKI KMKJ KMKK KMKM KMKN KMKQ KMKS KMKU KMKW KMLC KMLG KMLH KMLI KMLJ KMLP KMLQ KMLX KMLZ KMMB KMMF KMMH KMMI KMMN KMMP KMMU KMMV KMMW KMNC KMNG KMNH KMNI KMNJ KMNK KMNL KMNM KMNN KMNP KMNU KMNW KMNX KMNZ KMOB KMOF KMOH KMOI KMOW KMPA KMPD KMPE KMPF KMPI KMPJ KMPL KMPM KMPP KMPS KMPU KMPV KMPW KMQB KMQC KMQD KMQE KMQF KMQG KMQH KMQI KMQJ KMQK KMQL KMQM KMQN KMQO KMQP KMQQ KMQR KMQS KMQT KMQU KMQW KMQY KMQZ KMRH KMRI KMRM KMRP KMRU KMSF KMSM KMSQ KMSV KMSY KMSZ KMTD KMTF KMTM KMTO KMTQ KMTU KMUA KMUB KMUF KMUG KMUH KMUI KMUJ KMUK KMUO KMUP KMUQ KMUT KMUU KMUY KMVB KMVD KMVF KMVH KMVJ KMVO KMVV KMVW KMVY KMVZ KMWD KMWF KMWG KMWH KMWI KMWJ KMWK KMWL KMWN KMWO KMWP KMWQ KMWT KMWU KMWW KMWY KMWZ KMXC KMXU KMYD KMYE KMYF KMYG KMYH KMYJ KMYK KMYM KMYP KMYQ KMYR KMYV KMYW KMZB KMZC KMZD KMZF KMZG KMZH KMZI KMZJ KMZP KMZS KMZV KMZW KMZX KMZY

← KL call signs All prefixes KN 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.

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.