Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB1KJ callsign genealogy
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 KB1KJ's current licensee, walking backwards.
- Kozinski, JohnNHgranted 2023-06-01cancelled 2023-06-23
Successor callsigns
Callsigns held now by people who previously held KB1KJ.
- STARIN, MARK SNHgranted 2019-02-15
All historical holders
Every license row we've seen with the callsign KB1KJ, oldest first.
- Kozinski, John NH2023-06-23 active
- —— → cancelled 1999-03-11