Apex domains cannot have CNAME records.
Question and response
Question
dig egihosting.com. NS
Answer
egihosting.com. 5 NS ns1.egihosting.com.
egihosting.com. 5 NS ns2.egihosting.com.
egihosting.com. 5 NS ns3.egihosting.com.
Authority
The response has no authority records.
Additional
ns1.egihosting.com. 5 A 72.13.80.2
ns2.egihosting.com. 5 A 72.13.81.2
ns3.egihosting.com. 5 A 72.13.91.2
ns1.egihosting.com. 5 AAAA 2607:f358:1a:0:0:0:0:2
ns2.egihosting.com. 5 AAAA 2607:f358:1b:0:0:0:0:2
ns3.egihosting.com. 5 AAAA 2607:f358:1c:0:0:0:0:2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0