Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4GUY callsign genealogy
Currently held by TADLOCK, GUY 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 K4GUY's current licensee, walking backwards.
- TADLOCK, GUY MFLgranted 2017-12-05cancelled 2023-06-09
Successor callsigns
Callsigns held now by people who previously held K4GUY.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4GUY, oldest first.
- SURFARI COSTA RICA AMATEUR RADIO SOCIETY FL1998-01-07 → cancelled 2010-01-08
- Edwards, Nicholas F TN2011-01-08 → cancelled 2023-01-10
- TADLOCK, GUY M FL2023-06-09 active