Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB1Z callsign genealogy
Currently held by MIEDEMA, WARREN D
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 AB1Z's current licensee, walking backwards.
- MIEDEMA, WARREN DILgranted 1995-10-03cancelled 2002-07-02
Successor callsigns
Callsigns held now by people who previously held AB1Z.
- CARROLL, JOHN ANHgranted 2020-04-14
All historical holders
Every license row we've seen with the callsign AB1Z, oldest first.
- CARROLL, JOHN A NH1996-12-09 → cancelled 2000-05-05
- MIEDEMA, WARREN D IL2022-08-02 active