Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4JBY callsign genealogy
Currently held by Brown, James L
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 W4JBY's current licensee, walking backwards.
- Brown, James LFLgranted 2022-09-27cancelled 2022-10-18
Successor callsigns
Callsigns held now by people who previously held W4JBY.
- Catlin JR, James RCAgranted 2013-04-02cancelled 2025-06-28
All historical holders
Every license row we've seen with the callsign W4JBY, oldest first.
- Catlin Jr, James R TN2001-05-08 → cancelled 2003-06-27
- Brown, James L FL2022-10-18 active