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Alphanumeric sender

An alphanumeric sender, or Sender ID, displays a brand name in place of a number as the sender of an SMS, within a limit of 11 characters.

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In brief

An alphanumeric sender, or Sender ID, displays a brand name in place of a number as the sender of an SMS, within a limit of 11 characters.

To go deeper

Instead of a number, the displayed sender can amount to a string of characters that identifies the sender — the name of a brand, a store or a service. Its length does not exceed eleven characters.

This display comes with a major trade-off: since an alphanumeric sender isn't a number, the recipient can't reply to it at all. Messages using it must therefore offer another opt-out channel, usually a short code.

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Related concepts

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01Short codeA short code fits in a few digits, reserved for services, and is used notably for opt-outs and reporting.02A2P SMSAn A2P SMS (Application-to-Person) is a message emitted automatically by a computer system to a mobile, as opposed to a text written by a human.

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