Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0JBS callsign genealogy
Currently held by Schwarzbauer, Joseph B
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 K0JBS's current licensee, walking backwards.
- Schwarzbauer, Joseph BMOgranted 2013-01-30cancelled 2015-01-09
Successor callsigns
Callsigns held now by people who previously held K0JBS.
No current licensee on record previously held this callsign.