Short Codes are the easiest way businesses can send and receive SMS at scale. With a default base rate of 50 SMS per second (higher rates available upon request), Plivo’s Short Code service is perfect for time sensitive info that need to reach huge audiences. Also, unlike regular phone numbers, Short Codes are not tied to an area code and can be used as an easy to remember unique identifier across the entire country.
Under the US carrier regulations, only Short Codes are allowed for application to person (A2P) communication, while Long Codes are only allowed for person-to-person communication (P2P). Carrier regulations also require that the ratio of inbound to outbound SMS for Long Codes be better than 1:3, while there are no such restrictions on Short Codes. Long codes are also tied to an area code, whereas a Short Code is one number nation wide. This is why businesses who need to communicate to customers on a large scale only use short codes. We have two main short code offerings: Vanity Short Codes and Random Short Codes.
See What is the difference between a Short code vs a Long code? for a complete comparison.