Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4TBJ callsign genealogy
Currently held by JAMES, THOMAS B
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 W4TBJ's current licensee, walking backwards.
- JAMES, THOMAS BGAgranted 1991-05-14cancelled 2001-06-05
Successor callsigns
Callsigns held now by people who previously held W4TBJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4TBJ, oldest first.
- SIMAN, ROBERT A FL1987-08-18 → cancelled 1999-08-20
- JAMES, THOMAS B GA2023-02-24 active