Apex domains cannot have CNAME records.
Question and response
Question
dig endstream.com. NS
Answer
endstream.com. 3 NS ns1.endstream.net.
endstream.com. 3 NS ns2.endstream.net.
endstream.com. 3 NS ns3.endstream.net.
Authority
The response has no authority records.
Additional
ns1.endstream.net. 3 A 208.85.248.10
ns2.endstream.net. 3 A 208.85.248.11
ns3.endstream.net. 3 A 208.85.248.140
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0