superstar.co.ir has no CNAME records.
Question and response
Question
dig superstar.co.ir. NS
Answer
The response has no answer records.
Authority
co.ir. 900 SOA a.nic.ir. info.nic.ir. 2603080300 1800 900 604800 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0