Apex domains cannot have CNAME records.
Question and response
Question
dig lissod.com. NS
Answer
lissod.com. 5 NS nsa2.srv53.org.
lissod.com. 5 NS nsc1.srv53.com.
lissod.com. 5 NS nsb4.srv53.net.
lissod.com. 5 NS nsb1.srv53.com.
lissod.com. 5 NS nsc4.srv53.net.
lissod.com. 5 NS nsa3.srv53.com.
lissod.com. 5 NS nsb4.srv53.org.
lissod.com. 5 NS nsd2.srv53.org.
lissod.com. 5 NS nsa4.srv53.net.
lissod.com. 5 NS nsc3.srv53.org.
lissod.com. 5 NS nsd3.srv53.com.
lissod.com. 5 NS nsd3.srv53.net.
Authority
The response has no authority records.
Additional
nsc1.srv53.com. 1 A 78.27.225.73
nsc3.srv53.org. 1 A 78.27.225.65
nsd2.srv53.org. 1 A 89.184.64.95
nsc1.srv53.com. 1 AAAA 2a02:2279:0:1201:78:27:225:73
nsc3.srv53.org. 1 AAAA 2a02:2279:0:1201:78:27:225:65
nsd2.srv53.org. 1 AAAA 2a02:2278:70eb:298:89:184:64:95
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0