Apex domains cannot have CNAME records.
Question and response
Question
dig absorbcloud.com. NS
Answer
absorbcloud.com. 4 NS ns-376.awsdns-47.com.
absorbcloud.com. 4 NS ns-1240.awsdns-27.org.
absorbcloud.com. 4 NS ns-572.awsdns-07.net.
absorbcloud.com. 4 NS ns-2034.awsdns-62.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0