A2P SMS Compliance: Get Your Phone Numbers Registered

A2P (Application-to-Person) SMS compliance is now required for businesses sending text messages in the United States. Here's what you need to know.

What Is A2P 10DLC?

A2P 10DLC is a system that registers your business and phone numbers with carriers:

• A2P — Application-to-Person messaging
• 10DLC — 10-Digit Long Code (standard phone numbers)

Why Registration Matters

Without registration:

• Messages may be blocked or filtered
• Delivery rates drop significantly
• You risk carrier penalties
• Customers don't receive your texts

With registration:

• Better deliverability
• Higher throughput limits
• Carrier trust
• Compliant messaging

Compliance Requirements

Opt-In Process

You must have clear opt-in from contacts:

• Checkbox on forms
• Clear language about what they're signing up for
• Easy opt-out instructions

Message Content

Include required elements:

• Business identification
• Opt-out instructions (STOP to unsubscribe)
• No prohibited content

Privacy Policy

Your website needs a privacy policy that covers:

• How you collect phone numbers
• How you use them
• How to opt out

Getting Compliant in HighLevel

Step 1: Register Your Brand

Submit your business information for verification.

Step 2: Register Your Campaign

Describe how you'll use SMS (marketing, transactional, etc.).

Step 3: Register Phone Numbers

Link your phone numbers to your approved campaign.

Step 4: Update Your Forms

Add proper opt-in language to all forms collecting phone numbers.

Struggling With Approvals?

The standard HighLevel registration process uses Twilio infrastructure, which means multiple review layers that can delay approvals for weeks. If you're stuck in approval limbo or getting rejected for unclear reasons, SignalHouse offers a faster alternative—approvals typically under 48 hours with built-in compliance tools that auto-generate the opt-in language and privacy policy text carriers require.

See Also

• SignalHouse — Faster 10DLC approvals with built-in compliance tools
• Twilio — The infrastructure behind HighLevel SMS
• LC Phone — HighLevel's native phone system