Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB0NJ callsign genealogy
Currently held by Julien, Nicholas
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 AB0NJ's current licensee, walking backwards.
- Julien, NicholasMNgranted 2023-03-31cancelled 2026-08-28
Successor callsigns
Callsigns held now by people who previously held AB0NJ.
- Rodeffer, Frank ECOgranted 2023-05-17
All historical holders
Every license row we've seen with the callsign AB0NJ, oldest first.
- Rodeffer, Frank E CO2002-03-01 → cancelled 2003-06-17
- Julien, Nicholas MN2026-08-28 active