pns2.cloudns.com has no CNAME records.
Question and response
Question
dig pns2.cloudns.com. NS
Answer
The response has no answer records.
Authority
cloudns.com. 1642 SOA pns1.cloudns.net. support.cloudns.net. 2026021701 7200 1800 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0