Apex domains cannot have CNAME records.
Question and response
Question
dig colonialcraftsrailcar.com. NS
Answer
colonialcraftsrailcar.com. 5 NS ns-1294.awsdns-33.org.
colonialcraftsrailcar.com. 5 NS ns-1475.awsdns-56.org.
colonialcraftsrailcar.com. 5 NS ns-1723.awsdns-23.co.uk.
colonialcraftsrailcar.com. 5 NS ns-1962.awsdns-53.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0