Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD0BI callsign genealogy
Currently held by Appelbaum, Lawrence H
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 AD0BI's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held AD0BI.
No current licensee on record previously held this callsign.