An SMS code is a shortened phone number used to send text messages. Short codes are used mostly for sending mass text messages and for marketing campaigns. The number of digits in SMS codes varies from country to country and can be random or customized.
An SMS code can be a dedicated short code that is used by only one organization, or a shared short code used by several businesses and organizations. Each individual business or organization selects a keyword that is used to route messages on the shared short code.
SMS short codes are issued on a lease basis and are subject to compliance with legal guidelines and short code regulations.