Long and short code sms: What you should know about SMS sender identification

Carriers in different countries go to great lengths to prevent their customers from receiving spam. In order to send a large number of SMSs reliably and receive replies to them, companies also need a unique sender ID. This is the only way customers can match the SMS, such as an order or booking confirmation, to a company, and get in contact with them directly. From a technical point of view, there are basically three sender ID options. However, national regulations vary greatly.

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