Apex domains cannot have CNAME records.
Question and response
Question
dig aircabletv.com. NS
Answer
aircabletv.com. 4 NS ns5.metroconnect.com.ph.
aircabletv.com. 4 NS ns1.metroconnect.com.ph.
Authority
The response has no authority records.
Additional
ns1.metroconnect.com.ph. 4 A 202.69.191.11
ns5.metroconnect.com.ph. 4 A 136.239.252.11
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0