Apex domains cannot have CNAME records.
Question and response
Question
dig tulsairparts.com. NS
Answer
tulsairparts.com. 5 NS ns1.tulsairparts.com.
tulsairparts.com. 5 NS ns2.tulsairparts.com.
Authority
The response has no authority records.
Additional
ns1.tulsairparts.com. 5 A 74.91.113.115
ns2.tulsairparts.com. 5 A 74.91.119.155
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0