Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB0ZW callsign genealogy
Currently held by Magby, John A
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 AB0ZW's current licensee, walking backwards.
- Klassen, James DKSgranted 2023-06-22cancelled 2023-09-08
Successor callsigns
Callsigns held now by people who previously held AB0ZW.
- Magby, John ACOgranted 2004-01-30cancelled 2016-02-02
All historical holders
Every license row we've seen with the callsign AB0ZW, oldest first.
- Magby, John A CO2003-12-24 → cancelled 2004-01-30
- Klassen, James D KS2023-09-08 active