Phone number ID
A phone number ID is the identifier Meta assigns to a WhatsApp number registered on the Business Platform, used in place of the number itself when sending messages.
It matters during migration: the phone number stays the same to your customers, but the ID changes when the number moves between accounts. Anything that stored the ID has to be remapped. It is one of the small technical details that decides how painful a platform change is.
More in WhatsApp platform
Worth knowing alongside it.
- WhatsApp Business Account
- A WhatsApp Business Account, usually abbreviated WABA, is the container inside a Meta business that holds your WhatsApp phone numbers, message templates, and messaging settings.
- Embedded Signup
- Embedded Signup is Meta's in-product flow that lets a business connect its own WhatsApp Business Account and phone number to a software platform without leaving that platform.
- WhatsApp Business API
- The WhatsApp Business API is Meta's official interface for businesses to send and receive WhatsApp messages programmatically at scale.