Apex domains cannot have CNAME records.
Question and response
Question
dig archerirm.eu. NS
Answer
archerirm.eu. 5 NS ns-1123.awsdns-12.org.
archerirm.eu. 5 NS ns-1828.awsdns-36.co.uk.
archerirm.eu. 5 NS ns-382.awsdns-47.com.
archerirm.eu. 5 NS ns-876.awsdns-45.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0