Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4RJR callsign genealogy
Currently held by O BEIRNE, FRANK
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 N4RJR's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held N4RJR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4RJR, oldest first.
- O BEIRNE, FRANK VA1997-07-23 → cancelled 2009-07-24
- RIESTENBERG, ROBERT J FL2017-07-25 active