Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1SQM callsign genealogy
Currently held by Mathias, Jeremy S
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 W1SQM's current licensee, walking backwards.
- Hofmeister, Chris ANHgranted 2022-08-02cancelled 2026-02-07
Successor callsigns
Callsigns held now by people who previously held W1SQM.
- Mathias, Jeremy STXgranted 2021-04-27
All historical holders
Every license row we've seen with the callsign W1SQM, oldest first.
- WILCOX, GEORGE E RI2002-07-31 → cancelled 2014-10-28
- Mathias, Jeremy S MA2018-11-09 → cancelled 2021-04-27
- Hofmeister, Chris A NH2026-02-07 active