Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4PM callsign genealogy
Currently held by MARTINEZ, PEDRO A
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 KP4PM's current licensee, walking backwards.
- MARTINEZ, PEDRO APRgranted 2007-08-28cancelled 2010-08-14
Successor callsigns
Callsigns held now by people who previously held KP4PM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4PM, oldest first.
- LOPEZ, JESUS M PR1998-04-21 → cancelled 2010-04-22
- MARTINEZ, PEDRO A FL2020-05-18 active