Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KG4USA callsign genealogy
Currently held by SIMPSON, STEVEN E
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 KG4USA's current licensee, walking backwards.
- SIMPSON, STEVEN ESCgranted 2018-10-16cancelled 2025-04-12
Successor callsigns
Callsigns held now by people who previously held KG4USA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KG4USA, oldest first.
- Tingle, Robert K TN2012-08-04 → cancelled 2024-08-15
- SIMPSON, STEVEN E SC2025-04-12 active