s602a.ik2.com has no CNAME records.
Question and response
Question
dig s602a.ik2.com. NS
Answer
The response has no answer records.
Authority
ik2.com. 7921 SOA ns1.ik2.com. dns.ik2.com. 2026022502 14400 3600 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0