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Sources

Updated 3 Sep 2026 · 1 min read

Primary sources we cite across the site. Per-prefix sources are listed in the fact table of each prefix page.

  • National Telecommunications Commission (ntc.gov.ph): numbering plan and memorandum circulars on mobile number allocation.
  • Globe Telecom: prefix and coverage pages, SIM registration portal.
  • Smart Communications / PLDT: prefix and coverage pages, TNT and Sun brand pages, SIM registration portal.
  • DITO Telecommunity: launch announcements and prefix information.
  • Republic Act 11202 (Mobile Number Portability Act) and Republic Act 11934 (SIM Registration Act).

Add the exact URLs you verified against here before launch, and keep this list current.