Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WW4JRF callsign genealogy
Currently held by Frederick, Joseph R
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 WW4JRF's current licensee, walking backwards.
- Frederick, Joseph RFLgranted 2015-05-01cancelled 2016-01-29
Successor callsigns
Callsigns held now by people who previously held WW4JRF.
No current licensee on record previously held this callsign.