cnchestnut.com has no CNAME records.
Question and response
Question
dig cnchestnut.com. NS
Answer
The response has no answer records.
Authority
cnchestnut.com. 2 SOA ns1.cnchestnut.com. postmaster.cnchestnut.com. 2026012911 28800 7200 1209600 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0