Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K2OO callsign genealogy
Currently held by Thall, Andrew S
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 K2OO's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K2OO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K2OO, oldest first.
- ROCKHOLD, TERRY W NY1996-11-04 → cancelled 2008-11-05
- Thall, Andrew S OH2018-08-29 active