Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB4BL callsign genealogy
Currently held by MILLER, MORRIS
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 AB4BL's current licensee, walking backwards.
- Kostinchuk, MichaelFLgranted 2024-11-16cancelled 2026-05-27
Successor callsigns
Callsigns held now by people who previously held AB4BL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AB4BL, oldest first.
- MILLER, MORRIS NY1998-01-09 → cancelled 2010-01-12
- Kostinchuk, Michael FL2026-05-27 active