Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KI4MTM callsign genealogy
Currently held by Delamer, Michael J
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 KI4MTM's current licensee, walking backwards.
- Delamer, Michael JFLgranted 2023-07-18cancelled 2023-08-05
Successor callsigns
Callsigns held now by people who previously held KI4MTM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KI4MTM, oldest first.
- Delamer, Michael J FL2005-12-08 → cancelled 2017-12-09
- Delamer, Michael J FL2023-08-05 active