Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7WDZ callsign genealogy
Currently held by ZUMWALT, 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 K7WDZ's current licensee, walking backwards.
- ZUMWALT, WILLIAMWAgranted 2022-01-06cancelled 2022-02-05
Successor callsigns
Callsigns held now by people who previously held K7WDZ.
No current licensee on record previously held this callsign.