Apex domains cannot have CNAME records.
Question and response
Question
dig gaggle.net. NS
Answer
gaggle.net. 4 NS ns-1546.awsdns-01.co.uk.
gaggle.net. 4 NS ns-1269.awsdns-30.org.
gaggle.net. 4 NS ns-490.awsdns-61.com.
gaggle.net. 4 NS ns-810.awsdns-37.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0