Apex domains cannot have CNAME records.
Question and response
Question
dig li. NS
Answer
li. 5 NS e.nic.li.
li. 5 NS a.nic.li.
li. 5 NS f.nic.li.
li. 5 NS b.nic.li.
li. 5 NS d.nic.li.
Authority
The response has no authority records.
Additional
a.nic.li. 144319 A 130.59.31.42
b.nic.li. 168366 A 130.59.31.44
d.nic.li. 130179 A 194.0.25.40
e.nic.li. 24512 A 194.0.17.1
f.nic.li. 24512 A 194.146.106.14
a.nic.li. 144319 AAAA 2001:620:0:ff:0:0:0:57
b.nic.li. 168366 AAAA 2001:620:0:ff:0:0:0:59
d.nic.li. 130179 AAAA 2001:678:20:0:0:0:0:40
e.nic.li. 24512 AAAA 2001:678:3:0:0:0:0:1
f.nic.li. 24512 AAAA 2001:67c:1010:3:0:0:0:53
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0