Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1MFT callsign genealogy
Currently held by Johnson, Jack L
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 W1MFT's current licensee, walking backwards.
- Tomasco, Michael FCAgranted 2019-07-09cancelled 2019-07-27
Successor callsigns
Callsigns held now by people who previously held W1MFT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1MFT, oldest first.
- Johnson, Jack L CA2002-08-31 → cancelled 2014-09-03
- Tomasco, Michael F CA2019-07-27 active