Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4ZAW callsign genealogy
Currently held by WELCH JR, 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 K4ZAW's current licensee, walking backwards.
- WELCH JR, WILLIAM ASCgranted 2009-10-19cancelled 2019-04-09
Successor callsigns
Callsigns held now by people who previously held K4ZAW.
No current licensee on record previously held this callsign.