Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4YYM callsign genealogy
Currently held by Miller, John 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 KO4YYM'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 KO4YYM.
- Miller, John ASCgranted 2024-04-19cancelled 2024-05-10