Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KM4EM callsign genealogy
Currently held by Mueller, Eric C
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 KM4EM's current licensee, walking backwards.
- Mueller, Eric CFLgranted 2016-03-24cancelled 2019-06-18
Successor callsigns
Callsigns held now by people who previously held KM4EM.
No current licensee on record previously held this callsign.