Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4R callsign genealogy
Currently held by FALMAR, FRANK J
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 KP4R's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KP4R.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KP4R, oldest first.
- FALMAR, FRANK J PR2001-09-20 → cancelled 2013-09-21
- Ruiz, Enrique (Carlos) PR2023-09-26 active