Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N9IRS callsign genealogy
Currently held by KRUPA, JOSEPH A
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 N9IRS's current licensee, walking backwards.
- Zielinski, GabrielILgranted 2023-03-18cancelled 2023-12-15
Successor callsigns
Callsigns held now by people who previously held N9IRS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9IRS, oldest first.
- KRUPA, JOSEPH A IN1989-07-03 → cancelled 2001-07-04
- Zielinski, Gabriel IL2023-12-15 active