Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KK4JAB callsign genealogy
Currently held by Bergsing, John A
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 KK4JAB's current licensee, walking backwards.
- Bergsing, John ATNgranted 2026-07-14cancelled 2026-08-01
Successor callsigns
Callsigns held now by people who previously held KK4JAB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KK4JAB, oldest first.
- Corman, Chad W VA2012-05-04 → cancelled 2024-05-07
- Bergsing, John A TN2026-08-01 active