Shortcodes are the easiest way for a business to send and receive SMS messages at scale. With a default base rate of 50 SMS per second (higher rates available upon request), Plivo’s shortcode service is perfect for time-sensitive info that needs to reach large audiences. Unlike regular phone numbers, shortcodes are not tied to an area code and can be used as a memorable unique identifier across the entire country.
Under the US carrier regulations, only shortcodes are allowed for application-to-person (A2P) communications. 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 shortcodes. Long codes are also tied to an area code, whereas a shortcode remains the same nationwide. It’s for these reasons that businesses that need to communicate to customers on a large scale exclusively use shortcodes. We have two main shortcode offerings: vanity shortcodes and random shortcodes.
For more information, please refer to this article: What is the difference between a shortcode vs a long code?