28b2d55f.22.ik2.io has no CNAME records.
Question and response
Question
dig 28b2d55f.22.ik2.io. NS
Answer
The response has no answer records.
Authority
ik2.io. 1967 SOA ns1.ik2.com. dns.ik2.com. 2026030601 10800 3600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0