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K4MMU

Available1x3District 4

Competitive callsign — 2 applications filed with the FCC.

License HolderWITKO, WALTER

License ClassGeneral

Min. Class RequiredGeneral

LocationOCOEE, FL

Grant DateMay 7, 2007

Expiration DateJun 10, 2017

Cancellation DateJun 11, 2019

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K4MMU

Available1x3District 4

Competitive callsign — 2 applications filed with the FCC.

License HolderWITKO, WALTER

License ClassGeneral

Min. Class RequiredGeneral

LocationOCOEE, FL

Grant DateMay 7, 2007

Expiration DateJun 10, 2017

Cancellation DateJun 11, 2019

Available for ApplicationsJun 11, 2019

K4MMU is a highly sought-after 1x3 format amateur radio callsign. The license is currently held by WITKO, WALTER in OCOEE, FL. This callsign has attracted significant interest in the amateur radio community, with 2 vanity applications filed with the FCC. The most recent was submitted by Igbedior, Felix N on May 17, 2021. K4MMU has 3 recorded FCC license history events.

CW & Voice Analysis

Morse Code

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

CW Weight: 31 units(Moderate)

Voice Phonetics

Kilo Four Mike Mike Uniform

Readability: 8.5/10(High readability)

This callsign is available now

Requires General license or higher to apply for this callsign format (1x3).

License History

License ExpiredJun 11, 2019
License RenewedMay 7, 2007
Tax ID (TIN) AddedMay 7, 2007

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

Igbedior, Felix NFiled May 17, 2021
Not awardedFCC ↗
Black, John RFiled Sep 6, 2019
Not awardedFCC ↗

Search external databases

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← K4MMT K4MMV →

FCC data as of Sep 3, 2026

K4MMU FCC Vanity Status: 2 Competing Applications & History