Apex domains cannot have CNAME records.
Question and response
Question
dig immedion.com. NS
Answer
immedion.com. 3 NS cp-ns6.immedion.com.
immedion.com. 3 NS cp-ns5.immedion.com.
Authority
The response has no authority records.
Additional
cp-ns5.immedion.com. 3 A 156.154.64.63
cp-ns6.immedion.com. 3 A 156.154.65.63
cp-ns5.immedion.com. 3 AAAA 2001:502:f3ff:0:0:0:0:63
cp-ns6.immedion.com. 3 AAAA 2610:a1:1014:0:0:0:0:63
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0