Apex domains cannot have CNAME records.
Question and response
Question
dig syncreon.com. NS
Answer
syncreon.com. 5 NS ns2.syncreon.com.
syncreon.com. 5 NS ns1.syncreon.com.
Authority
The response has no authority records.
Additional
ns1.syncreon.com. 5 A 198.54.218.50
ns2.syncreon.com. 5 A 91.229.192.72
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0