Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4MTY callsign genealogy
Currently held by Clark, Susan E
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 K4MTY's current licensee, walking backwards.
- Montelongo, MichaelFLgranted 2021-03-18cancelled 2021-04-06
Successor callsigns
Callsigns held now by people who previously held K4MTY.
All historical holders
Every license row we've seen with the callsign K4MTY, oldest first.
- Clark, Susan E CA2011-01-04 → cancelled 2016-01-05
- Montelongo, Michael FL2021-04-06 → cancelled 2021-06-29