ph-tld-ns.dot.ph has no CNAME records.
Question and response
Question
dig ph-tld-ns.dot.ph. NS
Answer
The response has no answer records.
Authority
dot.ph. 474 SOA chris.ns.cloudflare.com. dns.cloudflare.com. 2398183688 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0