Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC8TMX callsign genealogy
Currently held by Seymour III, Laurence A
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 KC8TMX's current licensee, walking backwards.
- SEYMOUR III, LAURENCE AOHgranted 2025-05-22cancelled 2025-06-10
Successor callsigns
Callsigns held now by people who previously held KC8TMX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC8TMX, oldest first.
- Seymour III, Laurence A OH2012-05-09 → cancelled 2024-05-10
- SEYMOUR III, LAURENCE A OH2025-06-10 active