Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4CMM callsign genealogy
Currently held by CASTILLO MARCIAL, MARILYN
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 KP4CMM's current licensee, walking backwards.
- CASTILLO MARCIAL, MARILYNPRgranted 2022-02-07cancelled 2022-02-26
Successor callsigns
Callsigns held now by people who previously held KP4CMM.
No current licensee on record previously held this callsign.