Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KM4RVU callsign genealogy
Currently held by McMahon, James A
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 KM4RVU's current licensee, walking backwards.
- McMahon, James ANCgranted 2015-06-18cancelled 2016-03-03
Successor callsigns
Callsigns held now by people who previously held KM4RVU.
No current licensee on record previously held this callsign.