---
title: "Complete A2P 10DLC Registration Guide"
---

Complete A2P 10DLC Registration Guide: Brand & Campaign Approval: SMSRiver

- [Skip to main content](#main-content) [sms river .com](/) [Public Inboxes](/#numbers-section) [Country Codes](/country-codes/) [Workbench](/workbench/) [Tools](/tools/) [Developer API](/developer/) [Pricing](/pricing/) [Log In](/accounts/login/) [Log In](/accounts/login/) [Get API Key](/pricing/) [Home](/)

- [Articles](/articles/)

- Telecom Regulations & A2P 10DLC

Telecom Regulations & A2P 10DLC

Published 2026-08-11

•

10 min read

# Complete A2P 10DLC Registration Guide: Brand & Campaign Approval

Step-by-step developer guide to navigating US A2P 10DLC compliance. Pass Campaign Registry reviews, improve Brand Trust Scores, and prevent carrier blocks.

Key Takeaway & Executive Summary

Master US A2P 10DLC registration: Brand verification, Campaign use-case selection, sample message formatting, and privacy policy compliance.

Application-to-Person 10-Digit Long Code (A2P 10DLC) is the mandatory regulatory system governing all commercial messaging to US mobile subscribers. Unregistered numbers face severe carrier filtering, throughput throttling to 1 TPS, and penalty surcharges. This guide walks developers through end-to-end registration.

## Table of Contents

- [Step 1: Brand Registration and EIN Vetting](#section-1)

- [Step 2: Campaign Use-Case Configuration](#section-2)

- [Step 3: Sample Messages and Opt-In Disclosures](#section-3)

- [Frequently Asked Questions](#frequently-asked-questions)

## 1 Step 1: Brand Registration and EIN Vetting

Before provisioning numbers, register your legal corporate identity through The Campaign Registry (TCR). Required data includes legal business name, EIN / Tax ID, address, website, and authorized point of contact. TCR issues a Brand Trust Score from 0 to 100 determining maximum messaging throughput.

## 2 Step 2: Campaign Use-Case Configuration

Select an approved campaign use-case matching your product:

- 2FA / Account Notification: High trust, lowest carrier surcharges, fastest review.
- Customer Care / Support: Interactive two-way messaging.
- Marketing / Promotional: Strictest carrier review and higher carrier surcharges.

## 3 Step 3: Sample Messages and Opt-In Disclosures

Campaign rejections overwhelmingly stem from non-compliant sample messages. Every submitted campaign must include:

- Explicit Brand Identification: Name must match registered Brand.
- Clear Opt-Out Language: 'Reply STOP to cancel'.
- Help Information: 'Reply HELP for help'.
- Public Privacy Policy URL with clear disclosure that mobile data will not be shared with third parties for marketing.

## Frequently Asked Questions • Telecom Regulations & A2P 10DLC

How long does A2P 10DLC campaign vetting take?

Standard 10DLC campaign review typically takes between 3 and 10 business days. Expedited brand vetting can take 24 to 48 hours.

What happens if I send traffic on an unregistered 10DLC number?

Major US carriers (T-Mobile, AT&T, Verizon) block unregistered traffic with error code 30034 / 30007 and levy per-message penalty fees up to $0.01 per segment.

## Related Technical Articles & Deep Dives

[OTP & 2FA Engineering
9 min read

Short Codes vs 10DLC for High-Volume OTP Authentication](/articles/shortcodes-vs-10dlc-for-otp/)

[Telecom Regulations & A2P 10DLC
8 min read

CTIA Messaging Principles & Best Practices: Preventing Carrier Blocking](/articles/ctia-messaging-compliance-rules/)

[Telecom Regulations & A2P 10DLC
7 min read

SHAFT Compliance in SMS: Sex, Hate, Alcohol, Firearms, and Tobacco Restrictions](/articles/shaft-regulations-in-commercial-sms/)

Developer Sandbox

### Automate Inbound SMS & OTP Testing

Eliminate flaky 2FA in CI/CD. Access dedicated virtual lines, programmable synthetic SMS webhooks, and Model Context Protocol (MCP) integrations.

[Explore Developer Tiers →](/pricing/)
[View MCP Setup Guide](/developer/mcp-setup/)

### Developer Utilities

- [SMS Segment Calculator Calculate segment counts and carrier costs in real time.](/tools/sms-segment-calculator/)

- [Webhook Payload Validator Verify JSON webhook payloads against provider schemas.](/tools/webhook-payload-validator/)

- [SMS Delivery Troubleshooter Diagnose carrier filtering and OTP delivery failure.](/tools/sms-delivery-troubleshooter/)

- [E.164 Phone Number Formatter Format phone numbers into international E.164 standard.](/tools/phone-number-formatter/)

### Public Verification Numbers

- [United States (+1) View Line →](/receive-sms/us/)

- [United Kingdom (+44) View Line →](/receive-sms/gb/)

- [Canada (+1) View Line →](/receive-sms/ca/)

- [Germany (+49) View Line →](/receive-sms/de/)

Copied to clipboard

FULL PACKET INSPECTION
SMS

### Line: DE +49 ...

Timestamp: Just now

Extracted code

Copy Code

Message Body:

Copy Full Message

[Open Live Inbox](#)

smsriver.com

Central Office carrier inventory platform & developer SMS verification sandbox. Receive OTP codes instantly with zero SIM card requirement.

Public numbers·Live inboxes·Developer tools

Public Inboxes

- [United States (+1)](/receive-sms/us/)

- [United Kingdom (+44)](/receive-sms/gb/)

- [Canada (+1)](/receive-sms/ca/)

- [Philippines (+63)](/receive-sms/ph/)

- [Germany (+49)](/receive-sms/de/)

Developer & Tools

- [SMS Debugging Workbench](/workbench/)

- [Phone Number Inspector](/tools/phone-number-inspector/)

- [Bulk Phone Validator](/tools/bulk-phone-validator/)

- [Phone Lookup API](/developer/phone-lookup-api/)

- [E.164 Phone Formatter](/tools/phone-number-formatter/)

- [SMS Segment Calculator](/tools/sms-segment-calculator/)

- [Webhook Validator](/tools/webhook-payload-validator/)

Guides & Trust

- [Country Calling Codes](/country-codes/)

- [Troubleshooting Hub](/troubleshooting/)

- [Carrier Comparisons](/compare/)

- [Developer Reference](/developer/)

- [OpenAPI Specification](/openapi.json)

- [MCP Tools Manifest](/.well-known/mcp.json)

- [Privacy & Security Guides](/guides/)

- [Engineering Articles](/articles/)

© 2026 SMSRiver. Operating on Cloudflare Workers & D1. Adheres to CTIA Messaging Principles and 10DLC compliance standards.

[About](/about/)
[Contact](/contact/)
[Privacy Policy](/privacy/)
[Terms of Service](/guides/terms-of-service/)
Cookie Preferences