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