Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K1FMK callsign genealogy
Currently held by Kostyun, Frank 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 K1FMK's current licensee, walking backwards.
- Kostyun, Frank MAZgranted 2016-04-26cancelled 2016-05-14
Successor callsigns
Callsigns held now by people who previously held K1FMK.
No current licensee on record previously held this callsign.