Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KP4FRD callsign genealogy
Currently held by ROLDAN DIAZ, FELIX
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 KP4FRD's current licensee, walking backwards.
- ROLDAN DIAZ, FELIXcancelled 1999-01-28
Successor callsigns
Callsigns held now by people who previously held KP4FRD.
- ROLDAN, FELIX RPRgranted 2022-03-24