Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4WMM callsign genealogy
Currently held by Martinez Mendez, Wilfredo
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by KP4WMM's current licensee, walking backwards.
- Martinez Mendez, WilfredoPRgranted 2015-10-06cancelled 2015-11-06
Successor callsigns
Callsigns held now by people who previously held KP4WMM.
No current licensee on record previously held this callsign.