NXDOMAIN is RCODE 3. It differs from NOERROR with an empty answer, which means the name exists but has no record of the asked type. Resolvers cache negative answers too.
NXDOMAIN
The DNS response code meaning that the name does not exist.
NXDOMAIN is RCODE 3. It differs from NOERROR with an empty answer, which means the name exists but has no record of the asked type. Resolvers cache negative answers too.