db-i3.dotarai.com has no CNAME records.
Question and response
Question
dig db-i3.dotarai.com. NS
Answer
The response has no answer records.
Authority
dotarai.com. 1354 SOA ns.mail.in.th. hostmaster\.mail.in.th. 2026011329 86400 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0