Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K1MTD callsign genealogy
Currently held by Duval, Mary T
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 K1MTD's current licensee, walking backwards.
- Duval, Mary TCTgranted 2013-02-21cancelled 2013-03-16
Successor callsigns
Callsigns held now by people who previously held K1MTD.
- Duval, Mary TCTgranted 2023-11-17
All historical holders
Every license row we've seen with the callsign K1MTD, oldest first.
- SZRETTER, STANLEY J MA1997-02-11 → cancelled 2009-02-12
- Duval, Mary T CT2022-12-20 → cancelled 2023-11-17