Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KS4OT callsign genealogy
Currently held by COLLIS, JIMMY N
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 KS4OT's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KS4OT.
- COLLIS, JIMMY NGAgranted 2013-03-19cancelled 2013-05-03
All historical holders
Every license row we've seen with the callsign KS4OT, oldest first.
- COLLIS, JIMMY N GA2004-04-21 → cancelled 2013-03-19
- COLLIS, JIMMY N GA2023-05-02 active