Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9YZI callsign genealogy
Currently held by BERGER, WILLIAM H
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 W9YZI's current licensee, walking backwards.
- Berger, William MMNgranted 2001-08-06cancelled 2008-12-12
- N6XNQno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held W9YZI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9YZI, oldest first.
- BERGER, WILLIAM H MN1998-11-18 → cancelled 2008-01-11
- BERGER, WILLIAM M WI2018-09-18 active