Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0TOM callsign genealogy
Currently held by Hammes, Thomas P
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 K0TOM's current licensee, walking backwards.
- Hammes, Thomas PMNgranted 2008-02-20cancelled 2014-05-13
Successor callsigns
Callsigns held now by people who previously held K0TOM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0TOM, oldest first.
- Martin, Thomas A MO2002-04-23 → cancelled 2014-04-24
- Hammes, Thomas P MN2024-03-21 active
- COLLINS, TOM W— → cancelled 1999-06-03