Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AB7XX callsign genealogy
Currently held by DULIN, GATUS D
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 AB7XX's current licensee, walking backwards.
- BLACKMON, ALAN WIDgranted 2019-02-22cancelled 2020-12-08
Successor callsigns
Callsigns held now by people who previously held AB7XX.
- DULIN, GATUS DWAgranted 2000-06-13cancelled 2004-06-02
All historical holders
Every license row we've seen with the callsign AB7XX, oldest first.
- DULIN, GATUS D WA1998-05-01 → cancelled 2000-06-13
- BLACKMON, ALAN W ID2020-12-08 active