Apex domains cannot have CNAME records.
Question and response
Question
dig contegix.com. NS
Answer
contegix.com. 2 NS ns-58.awsdns-07.com.
contegix.com. 2 NS ns-1247.awsdns-27.org.
contegix.com. 2 NS ns-699.awsdns-23.net.
contegix.com. 2 NS ns-1959.awsdns-52.co.uk.
Authority
The response has no authority records.
Additional
ns-699.awsdns-23.net. 1 A 205.251.194.187
ns-1247.awsdns-27.org. 1 A 205.251.196.223
ns-1959.awsdns-52.co.uk. 1 A 205.251.199.167
ns-58.awsdns-07.com. 1 AAAA 2600:9000:5300:3a00:0:0:0:1
ns-699.awsdns-23.net. 1 AAAA 2600:9000:5302:bb00:0:0:0:1
ns-1247.awsdns-27.org. 1 AAAA 2600:9000:5304:df00:0:0:0:1
ns-1959.awsdns-52.co.uk. 1 AAAA 2600:9000:5307:a700:0:0:0:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0