Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4RFF callsign genealogy
Currently held by FRIJOUF, ROBERT F
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 K4RFF's current licensee, walking backwards.
- FRIJOUF, ROBERT FFLgranted 2013-07-09cancelled 2013-07-26
Successor callsigns
Callsigns held now by people who previously held K4RFF.
No current licensee on record previously held this callsign.