What Does Short Code Mean?
Short codes are special numbers that are shorter than telephone numbers and are mainly used for short message service and MMS. A short code is a shorter number to which an SMS or text message can be sent.
Techopedia Explains Short Code
Short codes are most commonly used in marketing campaigns or as a simple way for customers to communicate with companies that serve them. For example, following the earthquake in Haiti in 2010, people were able to make donations to charitable causes working to rebuild the country by texting “HAITI” to the short code 90999. The donation would then appear as a charge on the donor’s phone bill.