Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9JH callsign genealogy
Currently held by Cook, James L
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 K9JH's current licensee, walking backwards.
- Cook, James LSCgranted 2003-03-07cancelled 2007-09-18
Successor callsigns
Callsigns held now by people who previously held K9JH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9JH, oldest first.
- HORTENSTINE, JOHN T IL1996-09-19 → cancelled 2004-05-06
- Cook, James L SC2017-07-06 active