Apex domains cannot have CNAME records.
Question and response
Question
dig parspack.co. NS
Answer
parspack.co. 5 NS ns21.cloudns.net.
parspack.co. 5 NS ns23.cloudns.net.
parspack.co. 5 NS ns22.cloudns.net.
parspack.co. 5 NS ns24.cloudns.net.
Authority
The response has no authority records.
Additional
ns21.cloudns.net. 5 A 109.201.133.61
ns22.cloudns.net. 5 A 5.161.121.246
ns23.cloudns.net. 5 A 185.10.19.116
ns24.cloudns.net. 5 A 185.206.180.71
ns21.cloudns.net. 5 AAAA 2a00:1768:1001:9:0:0:0:21
ns22.cloudns.net. 5 AAAA 2a01:4ff:f0:e12c:0:0:0:1
ns23.cloudns.net. 5 AAAA 2a07:8dc0:1b:0:72:4eff:febc:d52d
ns24.cloudns.net. 5 AAAA 2a0b:1640:1:1:1:1:213:845c
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0