Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1RFR callsign genealogy
Currently held by Filizola, Ricardo P
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 K1RFR's current licensee, walking backwards.
- Filizola, Ricardo PTXgranted 2006-05-31cancelled 2006-06-24
Successor callsigns
Callsigns held now by people who previously held K1RFR.
No current licensee on record previously held this callsign.