https://www.cloudns.net/wiki/article/29/
ClouDNS: Master DNS Zone
Learn more about what a Master DNS zone is and how to add it at ClouDNS.
master dns zonecloudns
https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-R2-and-2008/ff807377(v=ws.10)?redirectedfrom=MSDN
DNS: Zone zone name master servers must respond to queries for the zone | Microsoft Learn
for themicrosoft learndnszonename