Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N9IRB callsign genealogy
Currently held by CHAPMAN SR, BRIAN 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 N9IRB's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held N9IRB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9IRB, oldest first.
- SIMNICK JR, WILLIAM G IL2009-05-18 → cancelled 2021-06-19
- CHAPMAN SR, BRIAN R NV2024-04-12 active