Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KM4AO callsign genealogy
Currently held by MC CULLOUGH III, CHARLES E
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 KM4AO's current licensee, walking backwards.
- WB4DVRno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held KM4AO.
- MC CULLOUGH III, CHARLES EILgranted 2024-11-27