Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB4DA callsign genealogy
Currently held by JACOBS, DENE 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 AB4DA's current licensee, walking backwards.
- JACOBS, DENE AALgranted 2019-10-08cancelled 2023-02-17
Successor callsigns
Callsigns held now by people who previously held AB4DA.
- LAMPMAN, DAN BFLgranted 2003-03-18cancelled 2003-04-11
All historical holders
Every license row we've seen with the callsign AB4DA, oldest first.
- LAMPMAN, DAN B FL1997-04-30 → cancelled 2003-03-18
- JACOBS, DENE A AL2023-02-17 active