Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4GCM callsign genealogy
Currently held by DULLES RADIO ARRL CLUB
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 KO4GCM's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KO4GCM.
- KI4ADactiveDULLES RADIO ARRL CLUBVAgranted 2020-09-01