SMS Configuration
Configure SMS sending, including number selection and A2P 10DLC registration for United States businesses.
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This configuration is only required for businesses located in the United States. Canadian businesses can use SMS messaging immediately without any configuration or registration requirements.
SMS Registration and Setup (US Businesses Only)
To prevent spam and ensure reliable delivery, phone carriers in the United States require businesses to register their phone numbers before sending SMS messages to customers (A2P 10DLC).
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Registration time can vary significantly from hours to weeks depending on various external factors. You should start the registration process early if you have a deadline for when you want to start using SMS.
To register a US-based business:
- Go to
Administration > Conversations Settings > Phone & SMSto see the registration card - Click “Register now” to view the form
- Fill out the form completely with your business information
- Submit your EIN (Employer Identification Number)
- Click “Submit information”
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You can save your progress if you're unsure of some fields and return to complete the registration later.
Your business will need an EIN number – a nine-digit number the IRS uses to identify your business for tax purposes. If you don’t know your EIN, you can apply for one by submitting IRS Form SS-4 online.
Configuration Steps
- Go to Administration > Conversations Settings > Phone & SMS.
- Complete the registration process above if you’re a US-based business.
- Select your sending number.
- Add opt-out language to automated messages.
Registration FAQs
What happens when I finish setup?
The onboarding checklist will disappear, but you can always revisit completed tasks or explore new features in your dashboard.