Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4KMM callsign genealogy
Currently held by Weickum, Herbert 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 K4KMM's current licensee, walking backwards.
- Frost, Michael ANCgranted 2024-06-22cancelled 2024-09-27
Successor callsigns
Callsigns held now by people who previously held K4KMM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4KMM, oldest first.
- Weickum, Herbert L CO2012-05-24 → cancelled 2024-08-20
- Frost, Michael A NC2024-09-27 active