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A2P 10DLC Everything you need to know

Writer: Ritch Saint-JeanRitch Saint-Jean

Updated: Aug 16, 2024


Two women holding phone

In an era where communication is the lifeblood of business operations, companies continuously seek innovative ways to connect with their customers more effectively. Application-to-Person (A2P) messaging has long been a cornerstone of business communication strategies, enabling businesses to send transactional, promotional, and informational messages directly to consumers' mobile devices. However, the landscape of A2P messaging is undergoing a significant transformation with the introduction of 10-digit Long Code (10DLC) messaging.

10DLC represents a pivotal advancement in business messaging, combining the familiarity of local phone numbers with the scalability and reliability needed for high-volume messaging. This new standard promises to enhance how businesses interact with their audience by providing a dedicated channel for clear, compliant, and efficient communication. But what exactly is A2P 10DLC, and why should companies consider adopting it?

In this article, we will delve into the essentials of A2P 10DLC, exploring its benefits, regulatory implications, and the opportunities it presents for businesses looking to elevate their customer engagement. Whether you're a small business owner or a large enterprise, understanding A2P 10DLC is crucial to staying ahead in the competitive world of digital communication. What is A2P 10DLC?

A2P 10DLC is a messaging solution that uses standard 10-digit phone numbers for sending application-to-person (A2P) messages. Unlike traditional long codes, which were primarily designed for person-to-person (P2P) communication, 10DLC numbers are specifically tailored for business messaging. This allows businesses to send high volumes of SMS and MMS messages with improved deliverability and compliance.

Key Benefits of A2P 10DLC:

  • Scalability: Supports high-volume messaging, making it ideal for marketing campaigns, alerts, and notifications.

  • Local Presence: Uses local phone numbers, enhancing customer trust and engagement.

  • Improved Deliverability: Designed for A2P traffic, reducing the risk of messages being marked as spam.

  • Compliance: Meets carrier regulations and guidelines, minimizing the risk of penalties.

Is A2P 10DLC Mandatory?

While A2P 10DLC is not universally mandatory, many U.S. carriers have implemented requirements for businesses using long codes to register their numbers and campaigns under the A2P 10DLC system. Non-compliance can lead to increased message filtering and potential fines. Therefore, it is highly recommended that businesses that rely on A2P messaging adopt 10DLC to ensure compliance and maintain message deliverability.

How to Register A2P 10DLC Using Twilio

Twilio, a leading cloud communications platform, provides a streamlined process for registering A2P 10DLC. Here are the steps to register:

  1. Create a Twilio Account:

    1. If you don’t already have a Twilio account, sign up at Twilio’s website.

  2. Submit Business Information:

    1. Log in to your Twilio account and navigate to the A2P 10DLC Registration section.

    2. Provide detailed business information, including your company name, address, and EIN (Employer Identification Number).

  3. Register Use Case(s):

    1. Specify the types of messages you plan to send (e.g., marketing, customer care, alerts).

    2. Submit detailed descriptions of your use cases to help carriers understand your messaging intent.

  4. Assign Phone Numbers:

    1. Link your 10-digit long codes to the registered use cases. This can include existing numbers or new ones purchased through Twilio.

  5. Submit for Carrier Approval:

    1. Once all information is provided, submit your registration for carrier approval. Twilio will handle the submission to carriers on your behalf.

How Long Does A2P 10DLC Registration Take?

The registration process typically involves a few stages, each with its own timeline:

  • Business Information Submission: Immediate to a few hours.

  • Use Case Registration: Typically processed within 1-3 business days.

  • Carrier Approval: This can take anywhere from a few days to a few weeks, depending on the carrier’s workload and the completeness of your application.

Overall, the entire registration process can take anywhere from 1 to 4 weeks. To avoid delays, ensure all provided information is accurate and complete.


Adopting A2P 10DLC is a crucial step for businesses leveraging SMS and MMS for customer engagement. Not only does it enhance message deliverability and compliance, but it also builds trust through the use of local numbers. While the registration process through platforms like Twilio is straightforward, it’s essential to complete it meticulously to ensure timely approval and uninterrupted communication with your customers. Embrace A2P 10DLC to future-proof your business messaging strategy and stay ahead in the competitive digital landscape.

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