810-fw.expedient.com has no CNAME records.
Question and response
Question
dig 810-fw.expedient.com. NS
Answer
The response has no answer records.
Authority
expedient.com. 3600 SOA auth1.dns.expedient.com. hostmaster.expedient.com. 2013111305 3600 900 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0