Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KF4VLK callsign genealogy
Currently held by OLSON, MICHAEL D
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 KF4VLK's current licensee, walking backwards.
- OLSON, MICHAEL Dcancelled 1998-01-15
Successor callsigns
Callsigns held now by people who previously held KF4VLK.
No current licensee on record previously held this callsign.