Apex domains cannot have CNAME records.
Question and response
Question
dig anubisnetworks.com. NS
Answer
anubisnetworks.com. 5 NS ns13.anubisnetworks.com.
anubisnetworks.com. 5 NS ns12.anubisnetworks.com.
anubisnetworks.com. 5 NS ns11.anubisnetworks.com.
Authority
The response has no authority records.
Additional
ns11.anubisnetworks.com. 5 A 185.175.91.11
ns12.anubisnetworks.com. 5 A 185.175.91.12
ns13.anubisnetworks.com. 5 A 185.175.91.13
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0