Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM4S callsign genealogy
Currently held by M. Huttemann, Diego
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 KM4S's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KM4S.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KM4S, oldest first.
- PICKRUM, JESSE H GA2013-02-27 → cancelled 2022-09-15
- M. Huttemann, Diego NC2024-10-04 active