An SMS short code is a five or six-digit phone number built for high-volume text messaging. Brands use short code numbers to text updates, promotions, and reminders to their contacts at scale. There are two types of short codes: memorable and random. Memorable short codes are hand-picked digits that spell out a phrase or have repeating numbers.

Short codes, also known as short numbers or SMS short codes, are five- or six-digit textable phone numbers (such as 858585) used by businesses and organizations to support SMS marketing and text communication strategies.

An SMS short code is a five or six-digit number that a brand uses for SMS marketing campaigns. By contrast, a long code or toll-free number consists of 10 digits. Consumers must opt in to receive messages from a brand by sending a keyword to its short code number. These are often automated SMS messages and part of a marketing sequence.

An SMS short code is a five or six-digit number that businesses use to market via SMS text messaging to their customers. Messages can be sent by either Multimedia Messaging System (MMS) or Short Message Service (SMS) systems through all mobile networks.