Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K2OB callsign genealogy
Currently held by Tudrej, Tomasz G
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 K2OB's current licensee, walking backwards.
- Tudrej, Tomasz GNJgranted 2022-05-28cancelled 2022-07-29
Successor callsigns
Callsigns held now by people who previously held K2OB.
- KOSZEGHY, JOHNFLgranted 2007-01-13cancelled 2015-11-05
All historical holders
Every license row we've seen with the callsign K2OB, oldest first.
- Warren, Robert F FL2010-04-14 → cancelled 2022-07-09
- Tudrej, Tomasz G NJ2022-07-29 active