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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:

  1. Go to Administration > Conversations Settings > Phone & SMS to see the registration card
  2. Click "Register now" to view the form
  3. Fill out the form completely with your business information
  4. Submit your EIN (Employer Identification Number)
  5. 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​

  1. Go to Administration > Conversations Settings > Phone & SMS.
  2. Complete the registration process above if you're a US-based business.
  3. Select your sending number.
  4. Add opt-out language to automated messages.

Registration FAQs​

How long does registration take?

Once the form has been submitted, registration through third-party verification can take anywhere from one week, up to one month. A third-party agency is used by telecom carriers in the United States to verify business registration data with government databases.

How can I ensure my application is approved?

The most common reason for rejection is information that doesn't match IRS records. Make sure the business information submitted matches exactly the same information associated with your EIN.

How does a business find their EIN / Tax ID?

An EIN is a nine-digit number the IRS uses to identify a business for tax purposes. The IRS issues a CP 575 EIN Confirmation Letter to confirm your unique Employer Identification Number. If you don't know your EIN, you can apply for one by submitting IRS Form SS-4 online.

Can sole-proprietor businesses without an EIN register for SMS?

Not at this time. We are investigating supporting this in the future, for both US- and Canada-based businesses.