Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4FLK callsign genealogy
Currently held by GRIFFIN, THOMAS R
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 W4FLK's current licensee, walking backwards.
- FLACK, MICHAEL RKYgranted 2022-01-10cancelled 2025-12-09
Successor callsigns
Callsigns held now by people who previously held W4FLK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4FLK, oldest first.
- GRIFFIN, THOMAS R NC1998-03-18 → cancelled 2010-03-19
- FLACK, MICHAEL R KY2025-12-09 active