Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4SDG callsign genealogy
Currently held by YOUNG, GEORGE 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 K4SDG's current licensee, walking backwards.
- Flowers, Matthew JALgranted 2012-07-18cancelled 2014-12-05
Successor callsigns
Callsigns held now by people who previously held K4SDG.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4SDG, oldest first.
- YOUNG, GEORGE R AL1998-04-27 → cancelled 2010-04-28
- Flowers, Matthew J AL2024-10-04 active