forward.mxroute.com has no CNAME records.
Question and response
Question
dig forward.mxroute.com. NS
Answer
The response has no answer records.
Authority
mxroute.com. 3600 SOA ns21.cloudns.net. support.cloudns.net. 2026022304 7200 1800 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0