ns0.claranet.com has no CNAME records.
Question and response
Question
dig ns0.claranet.com. NS
Answer
The response has no answer records.
Authority
claranet.com. 10800 SOA ns0.clara.net. hostmaster.clara.net. 2021051800 172800 3600 1728000 172800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0