Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W8TMS callsign genealogy
Currently held by Swartz, Thomas M
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 W8TMS's current licensee, walking backwards.
- Swartz, Thomas MMIgranted 2016-04-01cancelled 2018-07-17
Successor callsigns
Callsigns held now by people who previously held W8TMS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W8TMS, oldest first.
- IVERSON, ARTHUR L MI2006-04-05 → cancelled 2018-06-28
- Swartz, Thomas M MI2018-07-17 active