Apex domains cannot have CNAME records.
Question and response
Question
dig stabletransit.com. NS
Answer
stabletransit.com. 5 NS ns1.hostingmatrix.net.
stabletransit.com. 5 NS dns1.stabletransit.com.
stabletransit.com. 5 NS ns2.hostingmatrix.net.
stabletransit.com. 5 NS dns2.stabletransit.com.
Authority
The response has no authority records.
Additional
ns1.hostingmatrix.net. 5 A 69.20.95.4
ns2.hostingmatrix.net. 5 A 65.61.188.4
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0