Guides
How to check if a phone number uses iMessage
What iMessage registration means, blue vs green bubbles, iMessage vs RCS on iPhone, what businesses can and can't send, and a bulk API example.
7 min read
Articles tagged “Consent”
5 articles.
Developers
How to check if a phone number is on WhatsApp with an API
How a WhatsApp registration check works, what registered, not registered and unknown mean, and how to call it responsibly from cURL, Node and Python.
8 min read
Guides
Messaging-app registration checks: a guide for every app
What a registration check tells you for WhatsApp, Telegram, Viber, Signal, iMessage, RCS, LINE, Zalo and more: modes, unknowns, billing and consent.
8 min read
Guides
Telegram number check: a practical guide to what it can and can't tell you
How Telegram's phone and username model differs, what a registration check can and can't tell you, how privacy settings affect it, with API examples.
7 min read
Guides
WhatsApp Business account check: what the business flag tells you (and what it doesn't)
What the WhatsApp Business flag means, how it differs from a personal account, its limits, and how B2B and support teams can use it responsibly.
7 min read
