Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KZ0B callsign genealogy
Currently held by Olson II, Byron P
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 KZ0B's current licensee, walking backwards.
- McLaughlin, RobertSDgranted 2021-01-11cancelled 2021-01-29
Successor callsigns
Callsigns held now by people who previously held KZ0B.
- Olson II, Byron PSDgranted 2018-12-29
All historical holders
Every license row we've seen with the callsign KZ0B, oldest first.
- FRANK, MARTIN CO2006-04-05 → cancelled 2018-06-29
- Olson II, Byron P IA2018-07-17 → cancelled 2018-12-29
- McLaughlin, Robert SD2021-01-29 active