Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K6FJR callsign genealogy
Currently held by ROSENTHAL, FREDRICK 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 K6FJR's current licensee, walking backwards.
- ROSENTHAL, FREDRICK JCAgranted 2006-12-13cancelled 2015-03-27
Successor callsigns
Callsigns held now by people who previously held K6FJR.
No current licensee on record previously held this callsign.