KP4WMM
Active2x3District 4
Competitive callsign — 1 application filed with the FCC.
License HolderMartinez Mendez, Wilfredo
License ClassGeneral
Min. Class RequiredTechnician
LocationLas Piedras, PR
Grant DateDec 16, 2025
Expiration DateDec 16, 2035
KP4WMM is a highly sought-after 2x3 format amateur radio callsign. The license is currently held by Martinez Mendez, Wilfredo in Las Piedras, PR. 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 Martinez Mendez, Wilfredo on Oct 19, 2015. KP4WMM has 5 recorded FCC license history events.
CW & Voice Analysis
Morse Code
-.- .--. ....- .-- -- --
CW Weight: 41 units(Heavy (slower to send))
Voice Phonetics
Kilo Papa Four Whiskey Mike Mike
Readability: 8.5/10(High readability)
License History
- License RenewedDec 16, 2025
- License ModifiedFeb 3, 2017
- Administrative Update AppliedOct 14, 2016
- License IssuedNov 6, 2015
- Vanity Callsign GrantedNov 6, 2015
Vanity Application Activity
Competing applications filed with the FCC for this callsign.
- Martinez Mendez, WilfredoFiled Oct 19, 2015Not awardedFCC ↗