Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9DOO callsign genealogy
Currently held by HYATT, JAMES K
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 K9DOO's current licensee, walking backwards.
- HYATT, JAMES KCAgranted 2013-09-30cancelled 2014-01-22
Successor callsigns
Callsigns held now by people who previously held K9DOO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9DOO, oldest first.
- LAYMAN, NELSON H IL1998-09-02 → cancelled 2010-09-03
- HYATT, JAMES K CA2024-11-05 active