What is NXDOMAIN? · Ultra Transcenders glossary

Reply code meaning an authoritative DNS server has confirmed the name isn't there. Compare NODATA, where the name is real but lacks records of the type asked for.

Also called name error.

In the Ultra Transcenders books

AZ-802 ALZ

Each book explains NXDOMAIN in context, with comparison tables and the common traps.

Terms in this definition

DNS
The system that turns names into addresses. In Azure, private endpoints depend on private DNS zones, which are queried through 168.63.129.16.
WHERE
Limits a SELECT, UPDATE or DELETE to just the rows meeting a condition. Omit it, and the statement hits every row.

See NXDOMAIN in the full glossary