Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9TMM callsign genealogy
Currently held by Madlem, 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 W9TMM's current licensee, walking backwards.
- Madlem, Thomas MINgranted 2024-08-09cancelled 2024-11-02
Successor callsigns
Callsigns held now by people who previously held W9TMM.
No current licensee on record previously held this callsign.