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Short code

A short code fits in a few digits, reserved for services, and is used notably for opt-outs and reporting.

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In brief

A short code fits in a few digits, reserved for services, and is used notably for opt-outs and reporting.

To go deeper

A short code lines up four to six digits where a classic line has ten. Assigned to services and not to individuals, it serves as much to gather replies as to broadcast service messages.

In France, it underpins the professional SMS ecosystem: it gives the recipient the option to reply STOP to withdraw from a list, and 33700 plays there the role of national service for reporting unwanted SMS.

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Related concepts

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01Alphanumeric senderAn 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.02Opt-outOpt-out is the ability to leave a mailing list, embodied in SMS by the "STOP" notice.

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