Confidence: Medium · Source: FCC ULS · As of 2026-09-14
NI7J callsign genealogy
Currently held by COSTELLO, JAMES R
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 NI7J's current licensee, walking backwards.
- Douglass Sr, Ronald RAZgranted 2006-08-25cancelled 2006-10-24
Successor callsigns
Callsigns held now by people who previously held NI7J.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NI7J, oldest first.
- COSTELLO, JAMES R MT1994-05-17 → cancelled 2006-05-18
- DOUGLASS SR, RONALD R AZ2026-09-05 active