Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KW1Z callsign genealogy
Currently held by THORESON, STEVEN M
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 KW1Z's current licensee, walking backwards.
- THORESON, STEVEN MFLgranted 1995-02-27cancelled 2002-12-31
Successor callsigns
Callsigns held now by people who previously held KW1Z.
- FERREIRA, KENNETH MRIgranted 1999-07-09cancelled 2006-06-13
All historical holders
Every license row we've seen with the callsign KW1Z, oldest first.
- THORESON, STEVEN M FL2022-12-31 active
- FERREIRA, KENNETH M— → cancelled 1999-07-09