ns-bmi.execulink.com has no CNAME records.
Question and response
Question
dig ns-bmi.execulink.com. NS
Answer
The response has no answer records.
Authority
execulink.com. 7454 SOA mallet.execulink.net. sysadmin.execulink.com. 2026010801 158914 300 604800 345600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0