Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AA9SB callsign genealogy
Currently held by Nelson, Kerry W
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 AA9SB's current licensee, walking backwards.
- Borden, Stefan FPAgranted 2019-07-15cancelled 2020-05-22
Successor callsigns
Callsigns held now by people who previously held AA9SB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AA9SB, oldest first.
- Nelson, Kerry W IL2006-04-03 → cancelled 2018-04-04
- Borden, Stefan F PA2020-05-22 active