Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W0WWW callsign genealogy
Currently held by MFJ 90S RADIO CLUB
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 W0WWW's current licensee, walking backwards.
- Hesterwerth, Michael ACAgranted 2003-04-14cancelled 2003-05-09
Successor callsigns
Callsigns held now by people who previously held W0WWW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0WWW, oldest first.
- MFJ 90S RADIO CLUB MI1997-05-19 → cancelled 2000-08-10
- HESTERWERTH, MICHAEL A AZ2023-06-07 active