Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9BOO callsign genealogy
Currently held by Parzyszek III, William
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 W9BOO's current licensee, walking backwards.
- BOOHER, DAVID CILgranted 2014-07-03cancelled 2015-07-17
Successor callsigns
Callsigns held now by people who previously held W9BOO.
- Parzyszek III, WilliamWIgranted 2006-06-20cancelled 2007-10-13
All historical holders
Every license row we've seen with the callsign W9BOO, oldest first.
- Parzyszek III, William MI1998-11-23 → cancelled 2006-06-20
- BOOHER, DAVID C IL2015-07-17 active