AT&T Short Code and 10-Digit A2P SMS Messages Code of Conduct

The AT&T Short Code and 10-Digit A2P SMS Messages Code of Conduct governs the existing Short Code Application-to-Person (A2P) messaging system and the AT&T 10-digit long code (10DLC) A2P Messages. The 10DLC A2P Messages allows A2P SMS traffic originating from 10DLCs outside of AT&T’s network to be delivered to AT&T mobile customers.  AT&T has updated their Illegal/Prohibited Messaging Campaign descriptions for 2025.  That is also attached below.

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