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A2P (Application-to-Person) 10DLC registration is required for US-based businesses that send text messages to contacts. Without registration, carrier filtering may block your SMS messages. This lesson walks through the full registration process.
All contacts must have opted in to receive texts or calls from your business before you send them messages. This is a legal requirement for A2P messaging compliance.

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How to complete A2P 10DLC registration

1

Ensure your business profile is complete

Before starting registration, confirm that your Business Profile is fully filled out — legal business name, business address, EIN, and authorized representative details are all required.Go to Settings > Business Profile to review and complete this information.
2

Navigate to the Trust Center

Go to Settings > Phone Numbers > Trust Center (or Compliance).
3

Register your brand

Click Register Brand and enter:
  • Legal business name
  • Business EIN or tax ID
  • Business type and industry
  • Website URL
  • Business address
Submit the registration. Brand approval typically takes minutes to a few hours.
4

Create a campaign use case

Once your brand is approved, click Add Campaign. Provide:
  • The appropriate use case type (Marketing, Customer Care, Mixed, etc.)
  • A clear description of the types of messages you send
  • At least 2 sample messages that represent typical outgoing SMS content
Detailed, accurate descriptions significantly improve approval chances.
5

Wait for campaign approval

Campaign approval can take from a few hours to several business days. You will be notified when your campaign is approved.
6

Link your phone number to the registered campaign

After approval, ensure your purchased phone number is associated with your approved brand and campaign so it is authorized for compliant SMS sending.

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Key points

10DLC registration legitimizes your SMS traffic with US carriers. Registered campaigns experience fewer blocks, higher deliverability, and build trust with contacts — all of which translate to better results from your SMS marketing.
You need: your legal business name, EIN or tax identification number, business type, website URL, authorized representative contact details, and sample message content that accurately represents your campaign.
Brand registration is usually approved in minutes. Campaign approval takes longer — plan for 1 to 5 business days. Complete this step before scheduling SMS campaigns.
Unregistered SMS messages sent through 10DLC numbers may be filtered or blocked by carriers, resulting in failed deliveries. Completing registration protects your messaging operations.

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Key benefits

  • Improved delivery rates: Registered campaigns experience significantly less carrier filtering.
  • Reliable communication: Establishes a compliant, trustworthy messaging channel with your contacts.
  • Regulatory compliance: Meets all US regulations governing A2P SMS messaging.
  • Trust and credibility: Registered brands and campaigns build confidence with both carriers and contacts.
  • Call protection: Shaken/STIR validation for voice calls prevents your number from appearing as spam.
Last modified on March 4, 2026