Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4BWW callsign genealogy
Currently held by HAGEN, 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 K4BWW's current licensee, walking backwards.
- Harrod, Michael DFLgranted 2012-07-27cancelled 2013-09-10
Successor callsigns
Callsigns held now by people who previously held K4BWW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4BWW, oldest first.
- HAGEN, WILLIAM A CO1998-01-09 → cancelled 2010-01-12
- Harrod, Michael D FL2023-08-26 active