Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB1DO callsign genealogy
Currently held by DeGroot, Josephus F G
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 AB1DO's current licensee, walking backwards.
- DeGroot, Josephus F GCTgranted 2004-03-10cancelled 2004-04-06
Successor callsigns
Callsigns held now by people who previously held AB1DO.
No current licensee on record previously held this callsign.