Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4MM callsign genealogy
Currently held by RINCON WIRELESS CLUB
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 KP4MM's current licensee, walking backwards.
- WP4OGGcancelledRincon Wireless ClubPRgranted 2010-10-05cancelled 2010-10-26
Successor callsigns
Callsigns held now by people who previously held KP4MM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4MM, oldest first.
- MARTINEZ FRANK, EMILIO FL1997-08-18 → cancelled 2009-08-19
- RINCON WIRELESS CLUB FL2020-09-01 active