ns2.freepro.com has no CNAME records.
Question and response
Question
dig ns2.freepro.com. NS
Answer
The response has no answer records.
Authority
freepro.com. 7847 SOA ns1.as30781.net. hostmaster.as30781.net. 2026021901 21600 3600 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0