Apex domains cannot have CNAME records.
Question and response
Question
dig expedient.com. NS
Answer
expedient.com. 5 NS auth5.dns.expedient.com.
expedient.com. 5 NS auth1.dns.expedient.com.
expedient.com. 5 NS auth4.dns.expedient.net.
expedient.com. 5 NS auth2.dns.expedient.net.
expedient.com. 5 NS auth3.dns.expedient.com.
Authority
The response has no authority records.
Additional
auth1.dns.expedient.com. 5 A 209.166.168.15
auth2.dns.expedient.net. 5 A 216.183.191.12
auth3.dns.expedient.com. 5 A 207.54.143.204
auth4.dns.expedient.net. 5 A 209.166.144.108
auth5.dns.expedient.com. 5 A 216.230.112.43
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0