Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4JTK callsign genealogy
Currently held by Knott, John 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 N4JTK's current licensee, walking backwards.
- Knott, John TFLgranted 2002-11-06cancelled 2007-03-03
Successor callsigns
Callsigns held now by people who previously held N4JTK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4JTK, oldest first.
- FEINS, MARTIN M NV1997-08-18 → cancelled 2006-04-14
- Knott, John T FL2017-02-03 active