A2P 10DLC is a messaging standard that enables businesses to send Application-to-Person (A2P) SMS messages using a standard 10-digit long code (10DLC) phone number. Effective September 1st, 2023, all SMS and MMS messages sent to U.S. phone numbers using +1 10DLC phone numbers must be sent via an approved application-to-person (A2P) campaign. In the U.S., mobile carriers regulate business texting through A2P 10DLC systems to prevent spam. Please enter your business information EXACTLY as it appears when it was registered as a legal entity.