Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4MFK callsign genealogy
Currently held by KILLIAN, MICHAEL F
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 K4MFK's current licensee, walking backwards.
- KILLIAN, MICHAEL Fcancelled 1998-10-29
Successor callsigns
Callsigns held now by people who previously held K4MFK.
No current licensee on record previously held this callsign.