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A2P 10DLC Registration Explained for Contractors

Plain-English guide to the SMS compliance rules you need to know — without the legal jargon.

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Disclosure: I'm an independent publisher. This is informational, not legal advice. Check with your SMS provider for current requirements.

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What Is A2P 10DLC?

A2P = Application-to-Person 10DLC = 10-Digit Long Code (a standard local phone number)

In plain terms: If you're sending automated or bulk SMS messages to U.S. phone numbers from a local number (not a short code like 55555), carriers (Verizon, AT&T, T-Mobile, etc.) require you to register your business and your messaging use case.

This isn't a HighLevel rule. It's not a software rule. It's a carrier requirement enforced by the mobile networks themselves.

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Why This Exists

Carriers introduced A2P 10DLC to:

If you don't register, your texts may:

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Who Needs to Register?

If you're a contractor using missed-call text-back, appointment reminders, or follow-up sequences via SMS, you need to register.

It doesn't matter if you're using HighLevel, CallCatch, ZyraTalk, or any other platform. If you're sending automated texts from a local number to U.S. phones, this applies.

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What You'll Need to Register

  1. Your Business Legal Name (as registered with the state or IRS)

  2. Your Business EIN or SSN (for verification)

  3. Business Address

  4. Business Website (sometimes required, sometimes optional)

  5. Phone Number(s) you'll be sending from

  6. Use Case Description (what kind of messages you send and why)

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The Registration Process (Step-by-Step)

Step 1: Register Your Brand

Your "brand" is your business. You'll register once, and it can cover multiple phone numbers.

In HighLevel:

  1. Go to Settings → Phone System → A2P 10DLC Registration (or similar — UI may vary)

  2. Click Register Brand

  3. Fill in your business info (legal name, EIN/SSN, address, website)

  4. Submit

HighLevel acts as the "Campaign Service Provider" (CSP) and submits your registration to The Campaign Registry (TCR), which is the central database carriers use.

Step 2: Register Your Use Case / Campaign

Once your brand is approved (usually 1-3 business days), you register your campaign — which is just a description of what you're sending.

For contractors, the most common use case is:

Campaign details you'll provide:

Step 3: Wait for Approval

Carriers review your campaign. This typically takes 3-5 business days, sometimes longer during high-volume periods.

You'll get an approval or rejection notice in your platform.

Step 4: Pay the Fees

There are two types of fees:

One-time brand registration fee: ~$4 (varies by provider) Monthly campaign fee: ~$10-15 per phone number (varies by use case and carrier)

These fees are charged by the carriers, not your software provider. HighLevel (or whichever platform you use) just passes them through.

Step 5: Start Sending

Once approved, your texts will have full deliverability. You're compliant.

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Common Questions

Q: Do I need this if I only text back missed calls?

A: Yes. Even a single automated text in response to a missed call counts as A2P messaging.

Q: What if I just use my personal cell phone?

A: If you're manually texting from your personal number and not using automation, this doesn't apply. The moment you use software to send texts automatically, you're in A2P territory.

Q: Can I register myself, or does HighLevel do it?

A: You register through HighLevel (or your SMS platform). They submit to The Campaign Registry on your behalf. You can't register directly with TCR as an end user.

Q: What happens if I don't register?

A: Your texts may still go through initially, but deliverability will be inconsistent. Over time, carriers may block them entirely. You also risk fines (rare for small businesses, but possible).

Q: I have multiple business numbers. Do I register each one?

A: You register your brand once. Then you register a campaign for each number (or group of numbers with the same use case).

Q: Can I use the same campaign for marketing and service texts?

A: Yes, but you'll register as "Mixed" use case, which has slightly higher fees and more scrutiny. If you only send service-related texts (appointment reminders, follow-ups, missed-call responses), register as "Customer Care" to keep fees lower.

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Sample Use Case Description

When registering, you'll be asked to describe your messaging. Here's a sample for a plumbing business:

> "We are a residential plumbing company. We use SMS to respond to missed calls from potential customers, send appointment reminders, and follow up on estimates. Messages are sent only to people who have initiated contact with us by calling our business line. Customers can reply STOP to opt out. We send approximately 100-200 messages per month."

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Opt-Out and Consent Requirements

Carriers require you to:

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The Bottom Line

A2P 10DLC registration is paperwork, but it's not complicated. For a typical contractor:

If you're using HighLevel, the registration flow is built into the platform. Just follow the prompts.

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This guide is for informational purposes and reflects requirements as of May 2026. Carrier rules and fees may change. Consult your SMS provider or legal counsel for current requirements.