What is a short code?

A short code is a 5 or 6-digit number that can send and receive SMS messages with mobile phones. Short codes come in two varieties: vanity and random. What is the difference between a random and a vanity short code?

A vanity short code is a specific number that you choose when you lease your short code. A random short code is one that is assigned to you when you lease it, and cannot be reviewed or exchanged.