Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4ZYD callsign genealogy
Currently held by Monday, Terry 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 K4ZYD's current licensee, walking backwards.
- Monday, Terry ANCgranted 2002-11-27cancelled 2006-03-14
Successor callsigns
Callsigns held now by people who previously held K4ZYD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4ZYD, oldest first.
- MONDAY, RALPH E NC1997-01-17 → cancelled 1997-08-21
- Monday, Terry A NC2026-01-06 active