Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WW4JB callsign genealogy
Currently held by Brown, Jon 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 WW4JB's current licensee, walking backwards.
- Brown, Jon RFLgranted 2015-12-03cancelled 2017-03-12
Successor callsigns
Callsigns held now by people who previously held WW4JB.
No current licensee on record previously held this callsign.