Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4TBO callsign genealogy
Currently held by Thibeault, Lawrence
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 W4TBO's current licensee, walking backwards.
- Thibeault, LawrenceSCgranted 2021-08-05cancelled 2023-10-31
Successor callsigns
Callsigns held now by people who previously held W4TBO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4TBO, oldest first.
- LING, HOWARD G NC2006-05-25 → cancelled 2018-06-19
- Thibeault, Lawrence SC2023-10-31 active