Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4GSU callsign genealogy
Currently held by GEORGIA SOUTHERN UNIVERSITY RADIO CLUB
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 K4GSU's current licensee, walking backwards.
- BLACKMON, JEFFERY SRIgranted 2004-12-09cancelled 2011-10-18
Successor callsigns
Callsigns held now by people who previously held K4GSU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4GSU, oldest first.
- GEORGIA SOUTHERN UNIVERSITY RADIO CLUB GA1998-10-05 → cancelled 2010-10-06
- Blackmon, Jeffery S SC2021-08-03 active