Complete guide to registering your brand and campaign for A2P 10DLC compliance so you can send SMS messages to your contacts.
A2P (Application-to-Person) 10DLC registration is required for businesses that send text messages to contacts in the United States. Without registration, your SMS messages may be blocked or filtered as spam by carriers.
The A2P 10DLC Registration lesson in the HoopAI Academy
US carriers require businesses to register their brand and campaign before sending SMS at scale. Registration improves deliverability, prevents your messages from being filtered as spam, and establishes a compliant communication channel with your audience.
All contacts must have opted in to receive texts or calls from your business before you send messages to them. This is a legal requirement for A2P messaging compliance and cannot be skipped.
Before starting, make sure your Business Profile is fully complete — especially your legal business name, EIN (Employer Identification Number), business address, and authorized representative details.
Go to Settings > Business Profile and confirm your legal business name, EIN, business type, address, and authorized representative are all filled in accurately.
Your Business Profile must be complete before starting A2P registration
2
Navigate to the Trust Center
In the left sidebar, go to Settings > Phone Numbers > Trust Center (sometimes located under Compliance).
The Trust Center is where A2P 10DLC registration is managed
3
Register your brand
Click Register Brand. Enter your business information:
Legal business name
Business EIN or tax ID
Business type and industry
Website URL
Business address
Submit the brand registration. Brand approval typically takes a few minutes to a few hours.
4
Create a campaign use case
Once your brand is approved, click Add Campaign. Describe how you will use SMS:
Select the appropriate use case (Marketing, Customer Care, Mixed, etc.)
Write a clear, detailed description of the messages you send
Add at least 2 sample messages that represent typical outgoing SMS content
Be specific and accurate in your description. Vague campaign descriptions are the most common cause of registration delays or rejections.
5
Wait for campaign approval
Campaign approval takes anywhere from a few hours to several business days depending on the use case. You will be notified when the campaign is approved.
Completing the campaign details for A2P compliance
6
Link your phone number to your brand
After approval, ensure your purchased phone number is associated with your registered brand and campaign. This links your number to your approved registration for compliant sending.
7
Enable Shaken/STIR for voice calls (optional)
For voice calls, enable Shaken/STIR Trusted Calling to validate your caller ID and reduce the chance of calls being labeled as spam. This is configured in the phone number settings.
A2P 10DLC (Application-to-Person 10-Digit Long Code) is a US carrier framework that requires businesses to register their brand and campaign before sending text messages. It improves deliverability and reduces filtering of legitimate business messages.
What information is needed for registration
You need your legal business name, EIN, business type (LLC, sole proprietor, etc.), website URL, authorized representative contact information, and sample SMS message content.
How long does approval take
Brand registration is typically approved within minutes to a few hours. Campaign approval takes longer — usually 1 to 5 business days. Complete this process before launching any SMS campaigns.
What happens without registration
Without A2P registration, SMS messages sent through 10-digit long codes may be filtered or blocked by carriers, resulting in failed deliveries and potential compliance violations.
