Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K6OE callsign genealogy
Currently held by KOSIDOWSKI, FRANK
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 K6OE's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K6OE.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6OE, oldest first.
- STIRRAT, JOHN G CA2006-10-11 → cancelled 2018-12-19
- KOSIDOWSKI, FRANK ME2019-02-02 active