10DLC Registration Guide

What is 10DLC?

10DLC stands for 10-Digit Long Code, referring to standard US phone numbers used for business SMS. All major US carriers now require 10DLC registration for A2P (Application-to-Person) messaging to ensure compliance and reduce spam.

Why Register?

• Better deliverability — Registered traffic is less likely to be filtered
• Higher throughput — Send more messages per second
• Carrier compliance — Required by AT&T, Verizon, T-Mobile
• Trust — Proves legitimacy to carriers and recipients

Registration Steps

Step 1: Brand Registration

Register your business identity with The Campaign Registry (TCR). You'll need:

• Legal business name and DBA
• EIN (Tax ID number)
• Business address
• Website URL
• Contact information

Step 2: Campaign Registration

For each use case, register a campaign describing:

• Use case type — Marketing, transactional, 2FA, etc.
• Sample messages — Examples of what you'll send
• Consent process — How you obtain opt-in
• Opt-out handling — How recipients unsubscribe

Step 3: Number Assignment

Associate your phone numbers with approved campaigns. Each number can only be associated with one campaign at a time.

Timeline and Costs

Best Practices

• Be accurate — Provide correct business information
• Clear use cases — Describe exactly what you'll send
• Realistic samples — Provide actual message examples
• Consent documentation — Show how you collect opt-in
• One campaign per use case — Don't combine unrelated messaging