Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4CQ callsign genealogy
Currently held by Winter, Phillip M
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 KO4CQ's current licensee, walking backwards.
- Winter, Phillip MGAgranted 2008-11-25cancelled 2016-02-26
Successor callsigns
Callsigns held now by people who previously held KO4CQ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KO4CQ, oldest first.
- WINTER, BARBARA J NC1994-05-24 → cancelled 2006-05-25
- Winter, Phillip M GA2025-12-30 active