Apex domains cannot have CNAME records.
Question and response
Question
dig sprintdatacenter.net. NS
Answer
sprintdatacenter.net. 5 NS ns1.sprintdatacenter.net.
sprintdatacenter.net. 5 NS ns2.sprintdatacenter.net.
Authority
The response has no authority records.
Additional
ns1.sprintdatacenter.net. 5 A 46.29.16.105
ns2.sprintdatacenter.net. 5 A 89.191.144.119
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0