testgw.sol-bd.com has no CNAME records.
Question and response
Question
dig testgw.sol-bd.com. NS
Answer
The response has no answer records.
Authority
sol-bd.com. 3096 SOA nameserver1.sol-bd.com. litu.sol-bd.com. 2025081894 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0