mxr3.lasotel.net has no CNAME records.
Question and response
Question
dig mxr3.lasotel.net. NS
Answer
The response has no answer records.
Authority
lasotel.net. 3918 SOA ns1.lasotel.net. dns.lasotel.net. 2026011801 21600 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0