Apex domains cannot have CNAME records.
Question and response
Question
dig xand.com. NS
Answer
xand.com. 5 NS auth03.dns.xand.com.
xand.com. 5 NS auth01.dns.xand.com.
xand.com. 5 NS auth02.dns.xand.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0