Apex domains cannot have CNAME records.
Question and response
Question
dig integra.net. NS
Answer
integra.net. 5 NS nsx.integraonline.com.
integra.net. 5 NS nsy.integraonline.com.
Authority
The response has no authority records.
Additional
nsx.integraonline.com. 5 A 67.50.245.2
nsy.integraonline.com. 5 A 67.50.245.101
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0