Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB4TT callsign genealogy
Currently held by Knittel, J Steve
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 AB4TT's current licensee, walking backwards.
- Knittel, J SteveGAgranted 2011-03-15cancelled 2016-06-25
Successor callsigns
Callsigns held now by people who previously held AB4TT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AB4TT, oldest first.
- BRADSHAW, CHARLES R NC1999-12-21 → cancelled 2012-02-22
- Knittel, J Steve GA2016-06-25 active