Guides
Sender IDs
The sender ID is who a message says it's from: your brand name, or a phone number.
Every message's from must be one of your account's approved sender IDs; any other is refused with sender_not_approved. Register them on Sender IDs in the console.
What a sender ID can be#
| Kind | Rules | Example |
|---|---|---|
| Alphanumeric | 1–11 characters: letters, digits, spaces and . & _ -, with at least one letter | YourBrand |
| Numeric | 3–15 digits, optionally starting with + | +447700900142 |
Recipients can't reply to an alphanumeric sender. Some networks replace or reject senders they don't know, which is why each one is reviewed and registered before use.
Registering one#
- Request it in the console with a description of what you'll send (10–500 characters): order updates, sign-in codes, offers to customers who opted in…
- Pick the countries you'll send to under it. Where networks charge to register a sender, the console shows the one-time fee before you ask.
- We review it, usually within a business day. Once it's approved, the fees are charged once and you can send from it straight away.
Your account may be able to use a shared demo sender for trying the API. Register your own before real traffic: recipients trust a name they know.