Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4ZYX callsign genealogy
Currently held by Gottlieb, Matthew
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 W4ZYX's current licensee, walking backwards.
- Gottlieb, MatthewSCgranted 2010-05-17cancelled 2010-06-04
Successor callsigns
Callsigns held now by people who previously held W4ZYX.
No current licensee on record previously held this callsign.