Apex domains cannot have CNAME records.
Question and response
Question
dig biz. NS
Answer
biz. 5 NS n.gtld.biz.
biz. 5 NS a.gtld.biz.
biz. 5 NS c.gtld.biz.
biz. 5 NS m.gtld.biz.
biz. 5 NS b.gtld.biz.
biz. 5 NS w.gtld.biz.
biz. 5 NS x.gtld.biz.
biz. 5 NS y.gtld.biz.
Authority
The response has no authority records.
Additional
a.gtld.biz. 98378 A 156.154.124.65
b.gtld.biz. 27429 A 156.154.125.65
c.gtld.biz. 93228 A 156.154.127.65
m.gtld.biz. 166627 A 204.74.105.1
n.gtld.biz. 166627 A 204.74.107.1
w.gtld.biz. 166627 A 37.209.192.13
x.gtld.biz. 166627 A 37.209.194.13
y.gtld.biz. 166627 A 37.209.196.13
a.gtld.biz. 98378 AAAA 2001:502:ad09:0:0:0:0:30
m.gtld.biz. 166627 AAAA 2610:a1:3180:0:0:0:0:53
n.gtld.biz. 166627 AAAA 2610:a1:3280:0:0:0:0:53
w.gtld.biz. 166627 AAAA 2001:dcd:1:0:0:0:0:13
x.gtld.biz. 166627 AAAA 2001:dcd:2:0:0:0:0:13
y.gtld.biz. 166627 AAAA 2001:dcd:3:0:0:0:0:13
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0