Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N9JOK callsign genealogy
Currently held by HEIEN, THOMAS C
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 N9JOK's current licensee, walking backwards.
- KB9DOEno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held N9JOK.
- HEIEN, THOMAS CTXgranted 2019-12-10cancelled 2022-12-17