Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KP4MRM callsign genealogy
Currently held by RAMOS MERCADO, MILDRED
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 KP4MRM's current licensee, walking backwards.
- RAMOS MERCADO, MILDREDPRgranted 2021-06-07cancelled 2021-07-09
Successor callsigns
Callsigns held now by people who previously held KP4MRM.
No current licensee on record previously held this callsign.