srv01.nsdhost.com has no CNAME records.
Question and response
Question
dig srv01.nsdhost.com. NS
Answer
The response has no answer records.
Authority
nsdhost.com. 10754 SOA enma.nsdhost.com. inetlocker.gmail.com. 2026011101 3600 1800 1209600 14400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0