Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1SBA callsign genealogy
Currently held by WARNER, JAMES P
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 W1SBA's current licensee, walking backwards.
- Bratus, SergeyNHgranted 2017-01-25cancelled 2017-08-08
Successor callsigns
Callsigns held now by people who previously held W1SBA.
- WARNER, JAMES PIAgranted 2019-02-09
All historical holders
Every license row we've seen with the callsign W1SBA, oldest first.
- Bratus, Sergey NH2017-08-08 active
- WARNER, JAMES P— → cancelled 1999-04-21