Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N1RJ callsign genealogy
Currently held by DIsidoro, Richard M
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 N1RJ's current licensee, walking backwards.
- D Isidoro, Richard MMAgranted 2022-09-13cancelled 2023-02-04
Successor callsigns
Callsigns held now by people who previously held N1RJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1RJ, oldest first.
- JOHNSON, ROGER D ME2016-08-09 → cancelled 2021-01-14
- DIsidoro, Richard M MA2023-02-04 active