Apex domains cannot have CNAME records.
Question and response
Question
dig aravo.com. NS
Answer
aravo.com. 5 NS ns5.he.net.
aravo.com. 5 NS pns44.cloudns.net.
aravo.com. 5 NS pns42.cloudns.net.
aravo.com. 5 NS pns43.cloudns.net.
aravo.com. 5 NS ns1.he.net.
aravo.com. 5 NS pns41.cloudns.net.
Authority
The response has no authority records.
Additional
ns1.HE.NET. 5 A 216.218.130.2
ns5.HE.NET. 5 A 216.66.80.18
ns1.HE.NET. 5 AAAA 2001:470:100:0:0:0:0:2
ns5.HE.NET. 5 AAAA 2001:470:500:0:0:0:0:2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0