Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1MMT callsign genealogy
Currently held by RYAN, WILLIAM 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 W1MMT's current licensee, walking backwards.
- Kendall, MichaelMAgranted 2022-05-10cancelled 2022-05-28
Successor callsigns
Callsigns held now by people who previously held W1MMT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1MMT, oldest first.
- RYAN, WILLIAM F MA2006-08-15 → cancelled 2018-11-06
- Kendall, Michael MA2022-05-28 active