Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W5SQM callsign genealogy
Currently held by THWAITES II, WARREN 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 W5SQM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W5SQM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W5SQM, oldest first.
- THWAITES II, WARREN B TX1995-10-10 → cancelled 2000-09-11
- Mathias, Jeremy S TX2021-04-27 active