Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB2O callsign genealogy
Currently held by WELKLEY JR, RUSSELL E
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 AB2O's current licensee, walking backwards.
- Colacilli Sr., MarianoFLgranted 2022-09-09cancelled 2022-11-01
Successor callsigns
Callsigns held now by people who previously held AB2O.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AB2O, oldest first.
- WELKLEY JR, RUSSELL E NY2010-08-12 → cancelled 2022-10-12
- Colacilli, Mariano FL2022-11-01 active