Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N9RDX callsign genealogy
Currently held by RITTER, JERRY 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 N9RDX's current licensee, walking backwards.
- St Clair, Marvin FINgranted 2018-03-29cancelled 2018-05-25
Successor callsigns
Callsigns held now by people who previously held N9RDX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9RDX, oldest first.
- RITTER, JERRY R WI1992-10-06 → cancelled 2004-10-07
- St Clair, Marvin F IN2018-05-25 active