Apex domains cannot have CNAME records.
Question and response
Question
dig raxhosting.com. NS
Answer
raxhosting.com. 1 NS nsc3.raxhosting.com.
raxhosting.com. 1 NS nsc2.raxhosting.com.
raxhosting.com. 1 NS nsc1.raxhosting.com.
Authority
The response has no authority records.
Additional
nsc1.raxhosting.com. 1 A 185.31.121.180
nsc2.raxhosting.com. 1 A 185.31.121.181
nsc3.raxhosting.com. 1 A 68.233.44.216
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0