Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KN6JSI callsign genealogy
Currently held by Isaacson, Jeffry
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 KN6JSI's current licensee, walking backwards.
- Isaacson, JeffryCAgranted 2020-05-12cancelled 2020-06-01
Successor callsigns
Callsigns held now by people who previously held KN6JSI.
- Isaacson, JeffryORgranted 2020-09-22