Home/ Glossary/Phone Number ID
Phone Number ID
The numeric identifier Meta assigns to each phone number registered on a WhatsApp Business Account. API calls send messages from a Phone Number ID, not from the human-readable number itself.
One term from the WhatsApp Business Platform glossary. Last updated 2026-07-25.
Every number added to a WABA gets its own Phone Number ID. When a platform sends a message, it posts to an endpoint scoped to that ID — which is how one workspace can run several numbers with separate queues, templates and analytics without messages crossing between them.
The ID is stable for the life of the registration. If a number is deregistered and re-added, it receives a new Phone Number ID, which is why platform integrations keyed to the old ID have to be re-pointed after a migration.
Related terms
- WhatsApp Business Account (WABA)
- The asset inside Meta Business Manager that owns your WhatsApp phone numbers, message templates and quality ratings. Because the WABA stays in your name, you can move between providers without losing your number.
- Number registration
- The process of activating a phone number on the WhatsApp Business Platform, including ownership verification by SMS or voice call and setting the two-step verification PIN.
- WhatsApp Cloud API
- Meta's own hosted version of the WhatsApp Business Platform. Meta runs the servers, so a business connects through a provider without hosting any messaging infrastructure itself.
See Phone Number ID in a real workspace
BotPulsar runs the official WhatsApp Business Platform with unlimited team members on every plan, starting at ₹300/month.