Apex domains cannot have CNAME records.
Question and response
Question
dig ewr.datapipe.net. NS
Answer
ewr.datapipe.net. 5 NS dns1.hkg.datapipe.net.
ewr.datapipe.net. 5 NS dns1.lon.datapipe.net.
ewr.datapipe.net. 5 NS dns1.sjl.datapipe.net.
ewr.datapipe.net. 5 NS dns2.ewr.datapipe.net.
ewr.datapipe.net. 5 NS dns2.lon.datapipe.net.
ewr.datapipe.net. 5 NS dns1.ewr.datapipe.net.
Authority
The response has no authority records.
Additional
dns1.ewr.datapipe.net. 5 A 69.20.95.4
dns1.hkg.datapipe.net. 5 A 65.61.188.4
dns1.lon.datapipe.net. 5 A 69.20.95.4
dns1.sjl.datapipe.net. 5 A 65.61.188.4
dns2.ewr.datapipe.net. 5 A 69.20.95.4
dns2.lon.datapipe.net. 5 A 65.61.188.4
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0