Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5ZWW callsign genealogy
Currently held by HOWDY BOYS ORGANIZATION
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 K5ZWW's current licensee, walking backwards.
- Henderson, William JTXgranted 2020-09-11cancelled 2022-10-18
Successor callsigns
Callsigns held now by people who previously held K5ZWW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5ZWW, oldest first.
- HOWDY BOYS ORGANIZATION TX1998-12-15 → cancelled 2010-12-16
- Henderson, William J TX2022-10-18 active