Phone numbers that allow registered businesses to send SMS messages to U.S. phone numbers are called 10DLCs (10-digit long codes). 10DLCs are needed when sending an SMS message from any location to a U.S. number. 10DLCs focus on application-to-person (A2P) messaging for business purposes. In A2P messaging, a software application sends messages to mobile phone users (customers).
Businesses using a 10DLC number to send A2P messages must register their 10DLC. Otherwise, they risk facing penalties and fees from mobile network operators, which approve A2P messaging.
SMS and MMS messages from unregistered 10DLC numbers to U.S. phone numbers will be completely blocked effective December 1, 2024. It is mandatory to register your 10DLC for uninterrupted messaging services to U.S. phone numbers.
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