Confidence: Medium · Source: FCC ULS · As of 2026-09-11
AB3TO callsign genealogy
Currently held by Coulbourne, Gary M
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 AB3TO's current licensee, walking backwards.
- Coulbourne, Gary MPAgranted 2012-05-31cancelled 2013-11-27
Successor callsigns
Callsigns held now by people who previously held AB3TO.
No current licensee on record previously held this callsign.