A sender ID is the value shown as the sender of an SMS. Do not confuse it with the message sid returned by the API.
Outbound SMS sender IDs
The cloudnumbering API currently requires from to be a cloudnumbering number assigned to your organisation. Write it in E.164 format, including the leading +.
Custom alphanumeric sender IDs are not accepted for outbound API requests.
To route replies to your application, assign an SMS endpoint to the sending number.
Inbound SMS sender IDs
The from field in an inbound SMS webhook can contain either a phone number or an alphanumeric sender ID. Treat it as untrusted text and do not require E.164 format for inbound messages.
Message identifiers
After accepting an outbound message, the API returns result.sid. This identifies the message for delivery receipts and support investigations; it is not displayed to the recipient as the sender.
Troubleshooting
The API rejects my business name in from
Use an assigned cloudnumbering number in E.164 format. Custom alphanumeric outbound sender IDs are not supported.
Replies are not reaching my application
Check that an SMS endpoint is assigned to the from number and that its webhook or email destination is working.
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