Confidence: Medium · Source: FCC ULS · As of 2026-09-14
ND9J callsign genealogy
Currently held by Knoll, Jack
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 ND9J's current licensee, walking backwards.
- OWEN, TODDVAgranted 2014-10-24cancelled 2015-01-23
Successor callsigns
Callsigns held now by people who previously held ND9J.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign ND9J, oldest first.
- Knoll, Jack WI2004-08-24 → cancelled 2013-01-02
- OWEN, TODD VA2024-12-31 active