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WD4NMM

Available2x3District 4

Competitive callsign — 2 applications filed with the FCC.

License HolderKos, Michael R

License ClassTechnician

Min. Class RequiredTechnician

LocationWest Pittsburgh, PA

Grant DateJul 12, 2013

Expiration DateMar 5, 2024

Cancellation DateMay 7, 2026

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WD4NMM

Available2x3District 4

Competitive callsign — 2 applications filed with the FCC.

License HolderKos, Michael R

License ClassTechnician

Min. Class RequiredTechnician

LocationWest Pittsburgh, PA

Grant DateJul 12, 2013

Expiration DateMar 5, 2024

Cancellation DateMay 7, 2026

Available for ApplicationsMar 6, 2026

WD4NMM is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by Kos, Michael R in West Pittsburgh, PA. 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 DYE, RONALD G on Jul 17, 2000. WD4NMM has 4 recorded FCC license history events.

CW & Voice Analysis

Morse Code

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

CW Weight: 35 units(Moderate)

Voice Phonetics

Whiskey Delta Four November Mike Mike

Readability: 8/10(High readability)

This callsign is available now

Requires Technician license or higher to apply for this callsign format (2x3).

License History

License ExpiredMay 7, 2026
License RenewedJul 12, 2013
License ModifiedDec 17, 2003
License RenewedNov 20, 2003

Vanity Application Activity

Competing applications filed with the FCC for this callsign.

DYE, RONALD GFiled Jul 17, 2000
DismissedFCC ↗
GUSTAFSSON, MATS OFiled Jul 17, 2000
DismissedFCC ↗

Search external databases

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FCC data as of Jul 29, 2026

WD4NMM FCC Vanity Status: 2 Competing Applications & History