Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N9BY callsign genealogy
Currently held by ZENTGRAF, LARRY L
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 N9BY's current licensee, walking backwards.
- MIDENCE, CATHRYN NILgranted 2016-02-16cancelled 2019-04-12
Successor callsigns
Callsigns held now by people who previously held N9BY.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9BY, oldest first.
- ZENTGRAF, LARRY L IL2006-12-27 → cancelled 2019-03-26
- MIDENCE, CATHRYN N IL2019-04-12 active