Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA1BSA callsign genealogy
Currently held by SILKOWSKI, WILLIAM 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 KA1BSA's current licensee, walking backwards.
- KB1YRYcancelledYankee Clipper Council BSA ARCMAgranted 2012-10-02cancelled 2012-12-28
Successor callsigns
Callsigns held now by people who previously held KA1BSA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA1BSA, oldest first.
- SILKOWSKI, WILLIAM J CT1997-12-08 → cancelled 2009-12-09
- YANKEE CLIPPER COUNCIL BSA ARC RI2012-12-28 → cancelled 2024-12-31