Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N9BOO callsign genealogy
Currently held by Sturm, John E
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 N9BOO's current licensee, walking backwards.
- Sturm, John EILgranted 2024-01-23cancelled 2024-03-12
Successor callsigns
Callsigns held now by people who previously held N9BOO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N9BOO, oldest first.
- Swenson, Bruce D IN2011-02-15 → cancelled 2023-04-04
- Sturm, John E IL2024-03-12 active