Spare broadcast call signs

Available KU call signs

398 of the 676 KU 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.

KU call signs at a glance

Of the 676 four-letter KU combinations, 278 belong to broadcast stations and 398 are spare.

Those 278 calls are used by 306 stations (a call can be shared across services, like KXXX and KXXX-FM):

FM: 174
Full-power TV: 40
AM: 31
LPFM: 28
Low power TV: 23
Class A TV: 9

KU stations on the air include KUAC (FM, Fairbanks, AK), KUDL (FM, Sacramento, CA), KUJJ (FM, Mccall, ID), KUNY (FM, Paragonah, UT), KUSA (Full-power TV, Denver, CO), KUUZ (FM, Lake Village, AR).

The newest KU call: KUIR-LP, a new station's first call sign on October 7, 2026.

Among the spare ones: 2 released in the last 60 days, 2 used by a ship or shortwave station, 3 old ship calls whose license lapsed. Run any of them through Call Sign Check before you file.

Just released

KUFA KUIK

All spare KU call signs

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

KUAB KUAG KUAH KUAJ KUAQ KUAU KUAW KUAX KUAY KUBF KUBG KUBH KUBI KUBK KUBM KUBN KUBP KUBV KUBW KUBX KUBZ KUCE KUCF KUCG KUCJ KUCK KUCM KUCN KUCQ KUCS KUCT KUCX KUCY KUCZ KUDB KUDC KUDE KUDG KUDH KUDJ KUDK KUDM KUDN KUDP KUDQ KUDR KUDS KUDT KUDW KUDX KUDY KUDZ KUEA KUEB KUEC KUEE KUEF KUEG KUEI KUEJ KUEK KUEM KUEO KUEP KUEQ KUET KUEV KUEX KUEY KUFA KUFC KUFD KUFE KUFF KUFG KUFH KUFI KUFJ KUFK KUFP KUFQ KUFT KUFU KUFV KUFY KUFZ KUGC KUGD KUGE KUGG KUGH KUGI KUGJ KUGK KUGL KUGM KUGP KUGQ KUGT KUGU KUGV KUGW KUGX KUGY KUGZ KUHA KUHD KUHE KUHG KUHI KUHJ KUHK KUHN KUHO KUHP KUHQ KUHR KUHV KUHW KUHX KUHY KUHZ KUIA KUIB KUIE KUIF KUIG KUIH KUII KUIJ KUIK KUIO KUIP KUIQ KUIS KUIU KUIV KUIW KUIX KUIY KUIZ KUJA KUJB KUJC KUJD KUJE KUJF KUJG KUJH KUJI KUJK KUJL KUJM KUJN KUJO KUJP KUJQ KUJR KUJS KUJT KUJU KUJV KUJW KUJX KUJY KUKB KUKD KUKF KUKG KUKH KUKJ KUKK KUKM KUKO KUKP KUKQ KUKS KUKT KUKW KUKX KUKZ KULB KULF KULG KULI KULJ KULK KULN KULQ KULS KULT KULW KULZ KUMC KUME KUMF KUMG KUMH KUMK KUML KUMN KUMP KUMQ KUMZ KUNB KUNF KUNG KUNH KUNJ KUNL KUNN KUNT KUNZ KUOB KUOD KUOE KUOF KUOG KUOH KUOJ KUOQ KUOV KUOX KUOY KUOZ KUPA KUPC KUPE KUPF KUPG KUPJ KUPM KUPN KUPP KUPQ KUPW KUPZ KUQA KUQB KUQC KUQD KUQE KUQF KUQG KUQH KUQI KUQJ KUQK KUQM KUQN KUQO KUQP KUQR KUQS KUQT KUQV KUQW KUQX KUQY KUQZ KURD KURF KURG KURH KURI KURJ KURN KURO KURP KURQ KURW KURX KURZ KUSP KUSS KUSV KUSX KUSY KUSZ KUTB KUTD KUTG KUTJ KUTK KUTL KUTO KUTS KUTW KUUA KUUC KUUD KUUE KUUF KUUH KUUI KUUJ KUUM KUUN KUUO KUUP KUUQ KUUR KUUS KUUV KUUW KUUX KUUY KUVC KUVD KUVF KUVH KUVJ KUVK KUVL KUVP KUVQ KUVT KUVU KUVV KUVW KUVX KUVY KUVZ KUWB KUWF KUWH KUWM KUWQ KUWU KUXA KUXB KUXC KUXD KUXE KUXF KUXG KUXH KUXI KUXJ KUXK KUXL KUXM KUXN KUXO KUXP KUXQ KUXR KUXS KUXT KUXV KUXW KUXY KUXZ KUYA KUYB KUYC KUYD KUYE KUYF KUYG KUYH KUYJ KUYK KUYL KUYM KUYN KUYP KUYQ KUYR KUYS KUYT KUYU KUYV KUYW KUYX KUYZ KUZA KUZB KUZC KUZD KUZE KUZF KUZG KUZH KUZI KUZJ KUZK KUZL KUZM KUZO KUZP KUZQ KUZR KUZS KUZT KUZV KUZW KUZX

← KT call signs All prefixes KV 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.