Apex domains cannot have CNAME records.
Question and response
Question
dig hostid.net. NS
Answer
hostid.net. 5 NS ns-617.awsdns-13.net.
hostid.net. 5 NS ns-1283.awsdns-32.org.
hostid.net. 5 NS ns-1719.awsdns-22.co.uk.
hostid.net. 5 NS ns-406.awsdns-50.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0