Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N9RFS callsign genealogy
Currently held by KLOPNER, DAVID
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 N9RFS's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held N9RFS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9RFS, oldest first.
- ALLISON SR, TERRANCE A IL1992-10-06 → cancelled 2004-10-07
- KLOPNER, DAVID MO2014-12-11 active