Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KS1B callsign genealogy
Currently held by Sanders, William A
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 KS1B's current licensee, walking backwards.
- Cahill Jr, Douglas OMEgranted 2023-01-12cancelled 2023-05-05
Successor callsigns
Callsigns held now by people who previously held KS1B.
- Sanders, William ARIgranted 2021-04-16
All historical holders
Every license row we've seen with the callsign KS1B, oldest first.
- RIZZO, LAWRENCE F MA2008-07-08 → cancelled 2018-05-20
- Sanders, William A RI2020-07-17 → cancelled 2021-04-16
- Cahill Jr, Douglas O ME2023-05-05 active