Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0TJM callsign genealogy
Currently held by Montano, Thomas J
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 W0TJM's current licensee, walking backwards.
- Mumford, Thomas JORgranted 2026-08-04cancelled 2026-08-22
Successor callsigns
Callsigns held now by people who previously held W0TJM.
- Montano, Thomas JCAgranted 2020-03-03
All historical holders
Every license row we've seen with the callsign W0TJM, oldest first.
- Montano, Thomas J AZ2017-10-13 → cancelled 2020-03-03
- Mumford, Tom J OR2026-08-22 active