Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4FTK callsign genealogy
Currently held by GUTHRIE, GLENN S
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 W4FTK's current licensee, walking backwards.
- KN4OZUcancelledFleetTalk Amateur Radio GroupSCgranted 2018-09-17cancelled 2018-10-16
Successor callsigns
Callsigns held now by people who previously held W4FTK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4FTK, oldest first.
- GUTHRIE, GLENN S NC1994-05-17 → cancelled 2001-02-02
- FleetTalk Amateur Radio Group SC2018-10-16 active