host-156-122.cityonlinebd.net has no CNAME records.
Question and response
Question
dig host-156-122.cityonlinebd.net. NS
Answer
The response has no answer records.
Authority
cityonlinebd.net. 9474 SOA ns1.cityonlinebd.net. nabin.cityonlinebd.net. 2026021616 604800 86400 2419200 604800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0