A “short code” is a number that has only five digits. Example 32665 (FBOOK) for the social networking site Facebook. Texting it is done in the same manner as texting a 7- or 10-digit number. The procedure of messaging a short code is simple and works the same as texting on a regular cell phone.

A short code is a 5 or 6 digit phone number that is used to send text messages at scale. People opt into SMS marketing programs by texting a word or phrase known as a "keyword" to a short code. They are meant to be shorter than normal phone numbers to make the opt-in process easier.

A short code is a 5- or 6-digit phone number that is typically used for mass text messaging, SMS marketing, and automated texts. Short codes are easier to remember than traditional numbers and can send more messages per minute.