Important Updates for A2P 10DLC Messaging

This article serves as a historical record of important announcements, carrier changes, and compliance deadlines related to A2P 10DLC messaging. It documents how requirements and enforcement have evolved over time.

For current A2P 10DLC registration guidelines, see: What is A2P 10DLC - Brand and Campaign Registration

For current A2P 10DLC pricing and fee structures, see: Understanding A2P 10DLC Messaging Fees: Registration, Monthly, and Carrier Costs

Notice 1: Shutdown of Unregistered 10DLC Messaging (July 2023)

Starting July 5, 2023, all 10DLC phone numbers used to send text messages to U.S. numbers must be registered to an approved campaign under your brand. Messages sent from unregistered numbers faced increasing blocking, leading to a complete block of unregistered U.S.-bound messages after August 31, 2023.

Impact: Unregistered numbers could no longer send messages to parents and families in the United States.

Notice 2: Unregistered 10DLC Message Fee Increases

AT&T, T-Mobile, and Verizon raised per-message rates for unregistered traffic. Unregistered messages became subject to additional filtering or blocking.

To avoid higher fees and service disruptions, you needed to register your traffic for A2P 10DLC via the Enrollio Phone System Trust Center.

Notice 3: Sole Proprietor A2P 10DLC Registration - Currently Unavailable

Sole Proprietor Brand registration was introduced for sending low-volume messages. Individuals or small childcare businesses without a Tax ID (EIN) could refer to the FAQ for registration details.

Registration options:

• Low Volume Standard Brands: Less than 6,000 messages per day
• Standard Brands: More than 6,000 messages per day for mixed messaging campaigns

Note: Sole Proprietor registration is currently unavailable as of this update.

Notice 4: New Requirements for A2P 10DLC Registrations (January 2023)

Effective January 26, 2023, new A2P Campaign registrations underwent a vetting process with a one-time campaign vetting fee.

What is A2P 10DLC?

A2P 10DLC is a system in the United States that allows businesses to send Application-to-Person (A2P) messages via standard 10-digit long code (10DLC) phone numbers. This system is specific to long code messaging toward the United States, and does not affect shortcodes or Toll-Free numbers sending to the U.S.

For a complete overview of A2P 10DLC and answers to common questions, see What is A2P 10DLC?