Apex domains cannot have CNAME records.
Question and response
Question
dig pmops.net. NS
Answer
pmops.net. 5 NS ns-1677.awsdns-17.co.uk.
pmops.net. 5 NS ns-1006.awsdns-61.net.
pmops.net. 5 NS ns-42.awsdns-05.com.
pmops.net. 5 NS ns-1398.awsdns-46.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0