Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N1JTK callsign genealogy
Currently held by Knox, Jack T
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 N1JTK's current licensee, walking backwards.
- Knox, Jack TCTgranted 2019-07-10cancelled 2019-10-08
Successor callsigns
Callsigns held now by people who previously held N1JTK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1JTK, oldest first.
- BLACK, THOMAS J WA2002-11-20 → cancelled 2014-11-21
- Knox, Jack T CT2019-10-08 active