Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AB0ZT callsign genealogy
Currently held by Fifer Jr, John E
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 AB0ZT's current licensee, walking backwards.
- Fifer Jr, John ENEgranted 2019-02-13cancelled 2020-03-21
Successor callsigns
Callsigns held now by people who previously held AB0ZT.
- Hart, Bryant ECOgranted 2024-07-18
All historical holders
Every license row we've seen with the callsign AB0ZT, oldest first.
- Hart, Bryant E CO2001-01-30 → cancelled 2004-01-03
- Fifer Jr, John E NE2020-03-21 active