Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KG0SB callsign genealogy
Currently held by Breznai, Stephen J
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 KG0SB's current licensee, walking backwards.
- Breznai, Stephen JOHgranted 2025-08-15cancelled 2026-03-03
Successor callsigns
Callsigns held now by people who previously held KG0SB.
- HILDEBRANT, MARC SMAgranted 2007-04-17cancelled 2016-04-26
All historical holders
Every license row we've seen with the callsign KG0SB, oldest first.
- HILDEBRANT, MARC S MN2007-04-17 → cancelled 2011-11-10
- Breznai, Stephen J OH2026-03-03 active