cs306.way3.com has no CNAME records.
Question and response
Question
dig cs306.way3.com. NS
Answer
The response has no answer records.
Authority
way3.com. 3491 SOA ns1.way3.com. dnsadmin.way3.com. 2026022003 3600 1800 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0