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Phone Number Assignment

After your campaign is approved, the final step is assigning your US phone numbers to it. Messages sent from assigned numbers will be delivered as registered A2P traffic with higher deliverability.

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Prerequisites

Before assigning phone numbers:
  1. Approved Campaign - Your campaign must be approved (see Campaign Registration)
  2. US Phone Number - At least one active US phone number in your account

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How to Assign Numbers

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Via Dashboard

  1. Navigate to Phone Numbers in your Dashboard
  2. Find the phone number you want to assign
  3. Click on the phone number to open details
  4. Select the approved campaign from the dropdown
  5. Save changes
You can assign multiple phone numbers to the same campaign. This is useful for load balancing or geographic distribution.

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Assignment Rules

RuleDescription
One campaign per numberEach phone number can only be assigned to one campaign at a time
Multiple numbers per campaignA campaign can have multiple phone numbers assigned
US numbers onlyOnly US phone numbers require 10DLC registration
Active status requiredPhone number must be active to be assigned

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After Assignment

Once a phone number is assigned to an approved campaign:
  • Immediate effect - Messages are sent as registered A2P traffic
  • Higher throughput - Benefit from your Trust Score limits
  • Better deliverability - Carrier filtering is reduced
  • Compliance tracking - Messages are associated with your campaign
It may take a few minutes for the assignment to propagate to all carriers.

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Managing Assignments

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Reassigning Numbers

To move a phone number to a different campaign:
  1. Open the phone number details
  2. Select the new campaign
  3. Save changes
Reassigning a number takes effect immediately. Ensure the new campaign is appropriate for your messaging use case.

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Removing Assignment

To remove a phone number from a campaign:
  1. Open the phone number details
  2. Clear the campaign selection
  3. Save changes
Unassigned US phone numbers will have limited throughput and may experience carrier filtering.

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Troubleshooting

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Number not appearing for assignment

  • Verify the phone number is a US number
  • Check the phone number status is active
  • Ensure you have an approved campaign

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Assignment not taking effect

  • Wait a few minutes for carrier propagation
  • Verify the campaign is still approved
  • Check your account balance for any issues

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Low throughput after assignment

Your throughput is determined by your brand’s Trust Score:
Trust ScoreDaily LimitMessages/Second
Low2,0000.2
Medium10,0001
High200,00010+

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Best Practices

  1. Dedicated numbers per use case - Use separate numbers for different message types
  2. Geographic distribution - Use local area codes when possible
  3. Monitor delivery rates - Track message delivery in your dashboard
  4. Keep campaigns updated - Update sample messages if your content changes

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Summary

The complete 10DLC registration flow: 
1. Complete KYC verification
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2. Register Brand ($9) → Wait for approval (1-3 days)
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3. Create Campaign (~$20) → Wait for approval (1-7 days)
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4. Assign Phone Numbers → Ready to send!

10DLC Overview

Review the full process

Brand Registration

Start with brand registration