"does not exist in the DNS" - ticket number HKS-97338-356

Hi we have had a clients site working absolutely fine for months but today they are having some issues viewing their website / sending email.

I have done a DNS Lookup from here

It is saying …

Attempt to get a DNS server for accountax.net failed: accountax.net does not exist in the DNS.

This is seriously concerning? We have made no modifications as far as I am aware. My support ticket number is HKS-97338-356 … what has happened?

okay turns out the domain had expired