ns2.dnsowl.com has no CNAME records.
Question and response
Question
dig ns2.dnsowl.com. NS
Answer
The response has no answer records.
Authority
dnsowl.com. 10426 SOA ns1.dnsowl.com. hostmaster.dnsowl.com. 1772618223 7200 1800 1209600 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0