nslookup mongodb.net
Server: 80.58.61.250
Address: 80.58.61.250#53

Non-authoritative answer:

• • • Can't find mongodb.net: No answer

With Google:

nslookup mongodb.net
Server: 8.8.8.8
Address: 8.8.8.8#53

Non-authoritative answer:

• • • Can't find mongodb.net: No answer

With Open DNS

It means none of the atlas clusters can be contacted?

Is there some magic to getting the DNS to work?