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KB4MU

Active2x2District 4

Competitive callsign — 1 application filed with the FCC.

License HolderKing, David R

License ClassTechnician

Min. Class RequiredGeneral

LocationRancho Palos Verdes, CA

Grant DateAug 1, 2023

Expiration DateAug 10, 2033

KB4MU is a highly sought-after 2x2 format amateur radio callsign. The license is currently held by King, David R in Rancho Palos Verdes, CA. This callsign has attracted significant interest in the amateur radio community, with 1 vanity application filed with the FCC. The most recent was submitted by Spindler SR, David S on Jul 23, 2013. KB4MU has 6 recorded FCC license history events.

CW & Voice Analysis

Morse Code

-.- -... ....- -- ..-

CW Weight: 31 units(Moderate)

Voice Phonetics

Kilo Bravo Four Mike Uniform

Readability: 8/10(High readability)

License History

License RenewedAug 1, 2023
License IssuedAug 10, 2013
Vanity Callsign GrantedAug 10, 2013
License CanceledNov 15, 2011
Administrative Update AppliedOct 7, 2011
License RenewedMar 24, 2009

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

Spindler SR, David SFiled Jul 23, 2013
Not awardedFCC ↗

Search external databases

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FCC data as of Jul 29, 2026

KB4MU FCC Vanity Status: 1 Competing Application & History