ns2.app.omni-coder.com has no CNAME records.
Question and response
Question
dig ns2.app.omni-coder.com. NS
Answer
The response has no answer records.
Authority
app.omni-coder.com. 3439 SOA ns1.app.omni-coder.com. hostmaster.app.omni-coder.com. 2026021303 3600 3600 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0