Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KP4CMR callsign genealogy
Currently held by Mendez Ramos, Carlos
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 KP4CMR's current licensee, walking backwards.
- MARTINEZ RODRIGUEZ, CARLOS APRgranted 2022-03-21cancelled 2022-04-08
Successor callsigns
Callsigns held now by people who previously held KP4CMR.
- Mendez Ramos, CarlosMAgranted 2009-11-13cancelled 2010-12-24
All historical holders
Every license row we've seen with the callsign KP4CMR, oldest first.
- Mendez Ramos, Carlos MA2009-11-13 → cancelled 2010-08-26
- MARTINEZ RODRIGUEZ, CARLOS A PR2022-04-08 active