Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KN0BS callsign genealogy
Currently held by Bi-State Amateur Radio Club
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 KN0BS's current licensee, walking backwards.
- Schmalz, Bruce ACOgranted 2019-04-22cancelled 2025-01-11
Successor callsigns
Callsigns held now by people who previously held KN0BS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KN0BS, oldest first.
- Bi-State Amateur Radio Club IA2012-06-13 → cancelled 2024-06-12
- Schmalz, Bruce A CO2025-01-11 active