Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N0TFM callsign genealogy
Currently held by Mason, Todd F
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 N0TFM's current licensee, walking backwards.
- Mason, Todd FNEgranted 2023-12-01cancelled 2024-10-08
Successor callsigns
Callsigns held now by people who previously held N0TFM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N0TFM, oldest first.
- ZIMMERMAN, JEFFREY W KS1992-06-30 → cancelled 2004-07-01
- Mason, Todd F NE2024-10-08 active