Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB6KOO callsign genealogy
Currently held by O'Brien, Justin 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 WB6KOO's current licensee, walking backwards.
- O'Brien, Justin FAZgranted 2015-11-02cancelled 2017-03-28
Successor callsigns
Callsigns held now by people who previously held WB6KOO.
No current licensee on record previously held this callsign.