Apex domains cannot have CNAME records.
Question and response
Question
dig excedodns.com. NS
Answer
excedodns.com. 5 NS global.excedodns.com.
excedodns.com. 5 NS emea.excedodns.eu.
excedodns.com. 5 NS sto.excedodns.se.
Authority
The response has no authority records.
Additional
sto.excedodns.se. 5 A 185.42.137.101
emea.excedodns.eu. 5 A 194.58.192.48
global.excedodns.com. 5 A 194.58.198.48
sto.excedodns.se. 5 AAAA 2a01:3f0:400:0:0:0:0:48
emea.excedodns.eu. 5 AAAA 2a01:3f1:48:0:0:0:0:53
global.excedodns.com. 5 AAAA 2a01:3f1:3048:0:0:0:0:53
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0