Who This Is For / When to Use
Use this guide if you:
Send SMS or MMS messages to U.S. or Canada recipients using 10-digit long code numbers.
Are registering a new A2P Brand or Campaign in Kyrios.
Are troubleshooting rejected or filtered SMS campaigns.
What A2P 10DLC Is
A2P 10DLC (Application-to-Person 10-Digit Long Code) is the U.S. carrier framework that governs business messaging sent from standard 10-digit phone numbers.
It provides:
Higher delivery rates
Reduced carrier filtering
Predictable throughput based on Trust Score
A2P registration is also supported for some countries outside the U.S., depending on route requirements.
A2P Brand Registration Requirements
A2P Brand registration identifies who the business is.
Choose the Correct Brand Type
Business has a Tax ID (EIN, CCN, or equivalent):
Select Standard / Low Volume Brand Registration.
Business does not have a Tax ID but has a valid U.S. or Canada address:
Select Sole Proprietor Brand Registration.
Business has no Tax ID and is not based in the U.S. or Canada:
A2P Brand registration is not supported.
Use Toll-Free messaging instead.
Volume Guidance
Under 6,000 message segments/day → Low Volume Brand
Over 6,000 message segments/day → Standard Brand
Standard Brands require additional fees, including:
Brand registration fee
Campaign vetting fee
Monthly campaign fee
Trust Scores and Throughput
After Brand registration, each Brand receives a Trust Score.
Trust Scores:
Are assigned by the Campaign Registry
Directly control daily message throughput
Are grouped into three tiers (low → high)
Your Trust Score + Campaign Use Case determines sending limits.
Campaign Registration Overview
Campaign registration defines what type of messages are being sent.
Two requirements apply:
Brand registration (business identity)
Campaign registration (message purpose)
Forbidden use cases result in automatic rejection.
Step-by-Step Campaign Registration Flow
Step 1: Start Registration
Begin A2P Brand and Campaign registration from the Phone or Messaging settings.
Step 2: A2P Brand Details
Provide complete and accurate Brand information.
Required accuracy:
Legal business name
Physical address
Website
Authorized representative details
Step 3: Campaign Details
Campaigns are automatically submitted once the Brand is approved.
NOTE: Image is illustrative only.
Step 4: Campaign Use Case Selection
Select the use case that exactly matches your message intent.
Common options include:
Two-Factor Authentication (2FA)
Account Notifications
Customer Care
Delivery Notifications
Marketing
Mixed
Step 5: Sample Messages
Provide realistic, compliant examples of messages sent to end users.
Requirements:
Minimum length enforced by carriers
Match the registered use case
Use brackets for templated fields
Example: “Doctor check due for [John Doe]. Visit [www.business.com] or call [123-456-7890].”
Step 6: End-User Consent Details
Explain how users opt in to receive messages.
Include:
How consent is collected
Opt-in keywords (optional)
Opt-in confirmation message (optional)
Step 7: Content Flags
Declare whether messages include:
Embedded links
Phone numbers
Age-gated content
Lending or loan-related content
Step 8: Review and Submit
Confirm all information is accurate before submission.
Opt-In Guidelines (Critical)
Campaign rejections most often occur due to poor opt-in descriptions.
Accepted Opt-In Methods
Website Forms:
Checkbox consent required
Clear disclosure language
Website Posting:
Phone number clearly visible
Clear messaging purpose
Keyword or QR Code Opt-In:
One-word keywords only
Examples: START, YES, SUBSCRIBE
Spaces or phrases like “I Agree” are not permitted.
Required Website Opt-In Language
If website opt-in is selected, your site must include language such as:
“By providing your phone number, you agree to receive text messages from [Company Name]. Message and data rates may apply. Message frequency varies.”
Missing language results in rejection.
Consistency Requirements
Brand Consistency
All of the following must match:
Brand name
Website domain
Sample message branding
Use Case Consistency
Registered use case must match sample message content.
Incorrect example:
Marketing use case
OTP sample messages
Prohibited and High-Risk Content
Campaigns will be rejected for:
Illegal activities
Hate speech
Cannabis-related messaging
Cold outreach without consent
Email Domain Requirements
Large or established brands must use company-matching email domains.
Example rejection:
Brand name: Business Inc.
Email: [email protected]
Common Issues and Fixes
Campaign rejected for opt-in:
Expand consent explanation
Brand mismatch:
Align website, messages, and brand name
Wrong use case:
Select the closest accurate category
Toll-Free Messaging as an Alternative
Toll-Free messaging:
Requires verification
Does not require A2P Brand/Campaign registration
Is suitable for businesses unable to register A2P
Regional Messaging Rules
Canada-to-Canada
Older numbers may send without A2P
New numbers require Brand or identity verification
U.S./Canada to International
Identity verification only
Domestic U.S./Canada/Puerto Rico
A2P registration required
U.S./Canada to United Kingdom
Not supported
FAQ
What is A2P 10DLC?
A2P 10DLC is the U.S. carrier framework for business SMS sent from standard 10-digit phone numbers, providing improved deliverability and compliance.
Is A2P registration available outside the U.S.?
Yes. Availability depends on country and route requirements.
Can I use A2P 10DLC for cold outreach?
No. All A2P messaging must be permission-based.
What happens if my campaign includes prohibited content?
The campaign will be rejected during carrier vetting.
Can I use Toll-Free instead of A2P?
Yes. Toll-Free messaging is a supported alternative that requires verification but not A2P Brand registration.