Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N9JBT callsign genealogy
Currently held by COX, HENRY S
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 N9JBT's current licensee, walking backwards.
- TINKLER, JAMES BMAgranted 2005-04-28cancelled 2012-01-21
Successor callsigns
Callsigns held now by people who previously held N9JBT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9JBT, oldest first.
- COX, HENRY S IN1999-09-30 → cancelled 2011-11-22
- TINKLER, JAMES B MA2021-12-30 active