cn.suducdn.com has no NS records.
NS records for this zone are defined at suducdn.com.
NS records for this zone are defined at suducdn.com.
Question and response
Question
dig cn.suducdn.com. NS
Answer
The response has no answer records.
Authority
suducdn.com. 600 SOA ns1.alidns.com. hostmaster.hichina.com. 2026010913 3600 1200 86400 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0