s240.prosper.com.cn has no CNAME records.
Question and response
Question
dig s240.prosper.com.cn. NS
Answer
The response has no answer records.
Authority
prosper.com.cn. 600 SOA dns9.hichina.com. hostmaster.hichina.com. 2026011209 3600 1200 86400 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0