Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4SMM callsign genealogy
Currently held by MENDEZ MARRERO, SONIA
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 KP4SMM's current licensee, walking backwards.
- MENDEZ MARRERO, SONIAPRgranted 2023-05-09cancelled 2023-09-09
Successor callsigns
Callsigns held now by people who previously held KP4SMM.
- MENDEZ MARRERO, SONIAPRgranted 2025-07-19