Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KN9B callsign genealogy
Currently held by SWEDBERG, GARY M
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 KN9B's current licensee, walking backwards.
- CASTELLI, BRADLEYFLgranted 2009-06-22cancelled 2009-08-18
Successor callsigns
Callsigns held now by people who previously held KN9B.
- SWEDBERG, GARY MFLgranted 2024-05-09
All historical holders
Every license row we've seen with the callsign KN9B, oldest first.
- SWEDBERG, GARY M IL1997-09-05 → cancelled 2004-08-06
- CASTELLI, BRADLEY FL2019-06-05 active