Apex domains cannot have CNAME records.
Question and response
Question
dig org. NS
Answer
org. 5 NS b2.org.afilias-nst.org.
org. 5 NS c0.org.afilias-nst.info.
org. 5 NS a0.org.afilias-nst.info.
org. 5 NS b0.org.afilias-nst.org.
org. 5 NS d0.org.afilias-nst.org.
org. 5 NS a2.org.afilias-nst.info.
Authority
The response has no authority records.
Additional
a0.org.afilias-nst.info. 1 A 199.19.56.1
b0.org.afilias-nst.org. 3129 A 199.19.54.1
b2.org.afilias-nst.org. 34082 A 199.249.120.1
c0.org.afilias-nst.info. 1 A 199.19.53.1
d0.org.afilias-nst.org. 3129 A 199.19.57.1
a0.org.afilias-nst.info. 1 AAAA 2001:500:e:0:0:0:0:1
b0.org.afilias-nst.org. 3129 AAAA 2001:500:c:0:0:0:0:1
b2.org.afilias-nst.org. 34082 AAAA 2001:500:48:0:0:0:0:1
c0.org.afilias-nst.info. 1 AAAA 2001:500:b:0:0:0:0:1
d0.org.afilias-nst.org. 3129 AAAA 2001:500:f:0:0:0:0:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0