What Is 10DLC SMS Registration and Why Contractors Need It

If you've been sending text messages to customers from a regular 10-digit business number, you've probably started hearing about 10DLC registration. Maybe your texting platform flagged it. Maybe your messages started getting filtered. Maybe you have no idea what any of this means.

Here's the plain-English explanation — and why contractors who use SMS for follow-up, appointment reminders, or lead follow-up need to pay attention.

What 10DLC Is

10DLC stands for "10-digit long code" — basically, a regular-looking phone number (like the one you probably text customers from now). The carriers — AT&T, T-Mobile, Verizon — started requiring businesses that send texts from these numbers to register their numbers and campaigns with a central registry.

Why? Because 10-digit numbers became a favorite tool of spammers. Carriers got pressure to reduce spam texts, so they created the 10DLC registration system to verify that businesses texting customers are legitimate.

The short version: if you send business texts from a 10-digit number and aren't registered, your messages are increasingly likely to get filtered, blocked, or flagged as spam. Registration is the fix.

Who Needs to Register

If you use any of the following for customer communication as a business, 10DLC registration applies to you:

• Appointment reminders sent by text
• Estimate follow-ups by text
• Missed call text-back systems
• Review request texts after completed jobs
• Invoice reminders via SMS
• Any automated or bulk text message to customers

If you're just texting individual customers back and forth personally from your cell phone, that's generally exempt from business texting regulations. But any automated or business-initiated text communication from a business number requires registration.

What You Need to Register

10DLC registration involves two pieces:

Brand registration: Your business information — legal name, EIN, address, business type. One-time, costs around $4–$8 depending on the carrier registry.

Campaign registration: Describes the type of texts you're sending and how you collect customer consent (known as "opt-in"). For most contractors: appointment reminders, service notifications, follow-ups. Costs $10–$20 one-time, plus a monthly maintenance fee of $10–$15/month.

Most SMS platforms (Twilio, Podium, ServiceGuru, GoHighLevel, etc.) handle registration through their dashboard. You provide your business info and describe your use case. The platform handles the actual carrier registration.

Consent Is the Key Requirement

The most important compliance piece: you must have customer consent to text them. For contractors, this usually means one of:

• A checkbox on your booking form or estimate ("I agree to receive texts from [Company]")
• A verbal disclosure when you collect their number ("We'll send you appointment reminders and updates via text — is that okay?")
• An opt-in text confirmation after initial contact

You also need to include an opt-out option in your messages ("Reply STOP to unsubscribe") and honor opt-out requests immediately.

What Happens If You Don't Register

Starting in 2023 and continuing through 2024–2026, carriers have been increasingly filtering unregistered business texts. This means:

• Your appointment reminders may never reach customers
• Your review requests may get blocked
• Your missed call text-backs may look like spam
• Delivery rates on unregistered numbers are declining

For contractors who rely on SMS for customer communication, unregistered texting is becoming a real operational problem. Your follow-up system doesn't work if the texts don't get delivered.

How to Get Compliant

1. Check whether your SMS platform has 10DLC registration built in (most do now)
2. Complete brand registration in the platform — takes 10–15 minutes
3. Set up a campaign for each type of text you send (appointment reminders, follow-ups, etc.)
4. Audit your opt-in process — make sure you're capturing consent at booking
5. Add STOP language to your automated messages

Total time investment: 1–2 hours. Ongoing cost: $15–$25/month in registry fees, often absorbed into your platform pricing.

ServiceGuru handles 10DLC compliance for contractors automatically — registration, opt-in management, and compliant messaging built in. Start your free trial at serviceguru.ai/free-trial.