Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K2XOX callsign genealogy
Currently held by CW OPERATORS CLUB
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 K2XOX's current licensee, walking backwards.
- Tolentino, JonathanCAgranted 2021-11-22cancelled 2021-12-10
Successor callsigns
Callsigns held now by people who previously held K2XOX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K2XOX, oldest first.
- CW OPERATORS CLUB FL2005-09-20 → cancelled 2017-09-21
- Tolentino, Jonathan CA2021-12-10 active