What is 10DLC?

Last updated: November 5, 2026

10DLC is the standard framework for sending business SMS from 10-digit long code numbers in the United States.

What 10DLC means

  • 10DLC stands for 10-digit long code.

  • It is used by businesses for application-to-person SMS messaging.

  • U.S. carriers require businesses to register their brand and messaging use case.

  • Registration helps carriers reduce spam and improve deliverability for legitimate senders.

Why 10DLC matters

  • Unregistered or non-compliant traffic may be blocked.

  • Registered use cases can receive better delivery outcomes.

  • Throughput limits may depend on registration details and use case.

  • Message content must match the registered purpose.

How to stay compliant

  1. Make sure your business and SMS use case are registered.

  2. Message only opted-in contacts.

  3. Keep message content aligned with your registered campaign purpose.

  4. Follow opt-out requirements.

  5. Avoid prohibited or high-risk content.

  6. Monitor delivery trends for signs of filtering or blocks.

Troubleshooting

  • If messages are blocked, confirm your number and campaign are registered.

  • If throughput is limited, review the campaign use case and sending volume.

  • If deliverability drops, review message content and compliance practices.