Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N9IYN callsign genealogy
Currently held by Oldenberg, Randel 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 N9IYN's current licensee, walking backwards.
- Oldenberg, Randel RWIgranted 2024-01-24cancelled 2024-04-09
Successor callsigns
Callsigns held now by people who previously held N9IYN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9IYN, oldest first.
- OLDENBERG, RANDEL R WI2010-01-26 → cancelled 2022-04-12
- Oldenberg, Randel R WI2024-04-09 active