Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0JAK callsign genealogy
Currently held by Gilfillan Jr, John T
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 K0JAK's current licensee, walking backwards.
- Gilfillan Jr, John TGAgranted 2003-12-11cancelled 2004-01-23
Successor callsigns
Callsigns held now by people who previously held K0JAK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0JAK, oldest first.
- LINDSEY, CHARLES A OR1998-11-12 → cancelled 2003-08-21
- Gilfillan Jr, John T GA2016-01-06 active