_netblocks1.luxsci.com has no CNAME records.
Question and response
Question
dig _netblocks1.luxsci.com. NS
Answer
The response has no answer records.
Authority
luxsci.com. 18 SOA dns1.easydns.com. zone.easydns.com. 1771813406 43200 10800 1857600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0