Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1SWR callsign genealogy
Currently held by Sinclair, Ben J
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 K1SWR's current licensee, walking backwards.
- Sinclair, Ben JIAgranted 2007-02-14cancelled 2015-01-21
Successor callsigns
Callsigns held now by people who previously held K1SWR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K1SWR, oldest first.
- FLEET, BARRY M MA1998-01-08 → cancelled 2010-01-09
- Sinclair, Ben J IA2025-01-08 active