Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4JAG callsign genealogy
Currently held by HARDEN JR, JOHN W
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 K4JAG's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K4JAG.
- HARDEN JR, JOHN WGAgranted 2018-04-26
All historical holders
Every license row we've seen with the callsign K4JAG, oldest first.
- Glass, Joel A ME2020-07-07 active
- HARDEN JR, JOHN W— → cancelled 1998-07-22