Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB4NT callsign genealogy
Currently held by GUERIN, RALPH 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 AB4NT's current licensee, walking backwards.
- Nau, Harold BFLgranted 2020-12-14cancelled 2023-02-04
Successor callsigns
Callsigns held now by people who previously held AB4NT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AB4NT, oldest first.
- GUERIN, RALPH E FL1989-04-04 → cancelled 2001-04-05
- NAU, HAROLD B FL2023-02-04 active