Apex domains cannot have CNAME records.
Question and response
Question
dig emc.com.ph. NS
Answer
emc.com.ph. 5 NS dns1.emc.com.ph.
emc.com.ph. 5 NS dns2.emc.com.ph.
Authority
The response has no authority records.
Additional
dns1.emc.com.ph. 5 A 203.119.4.50
dns2.emc.com.ph. 5 A 209.58.186.38
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0