Confidence: Medium · Source: FCC ULS · As of 2026-09-14
NA1J callsign genealogy
Currently held by SEIDEL, JACOB C
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 NA1J's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held NA1J.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NA1J, oldest first.
- JEFFREY, FRED A RI2015-02-24 → cancelled 2022-03-17
- SEIDEL, JACOB C TX2024-04-05 active