Apex domains cannot have CNAME records.
Question and response
Question
dig dcp.se. NS
Answer
dcp.se. 4 NS ns-706.awsdns-24.net.
dcp.se. 4 NS ns-1945.awsdns-51.co.uk.
dcp.se. 4 NS ns-269.awsdns-33.com.
dcp.se. 4 NS ns-1523.awsdns-62.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0