Confidence: Medium · Source: FCC ULS · As of 2026-09-11
AB0TO callsign genealogy
Currently held by Bartholomew, David F
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 AB0TO's current licensee, walking backwards.
- Bartholomew, David FMOgranted 2000-05-09cancelled 2002-01-17
Successor callsigns
Callsigns held now by people who previously held AB0TO.
No current licensee on record previously held this callsign.