10DLC Registration for Appointment Reminders
10DLC (10-Digit Long Code) registration is required for every US business sending SMS through an application. Here's what it means, why it matters, and how Appointment Reminder handles it for you.
Last updated: March 2026
What is 10DLC?
10DLC is a carrier-approved messaging system that requires US businesses to register before sending application-to-person (A2P) text messages through standard 10-digit phone numbers. It was introduced by major carriers (AT&T, T-Mobile, Verizon) to reduce spam and improve SMS deliverability.
Every US business that uses any software — not just Appointment Reminder — to send text messages must complete 10DLC registration. This applies even if you're sending just a few messages per month.
Without 10DLC registration, your text messages will be blocked by carriers and your patients or clients will not receive their appointment reminders.
Unregistered messages are being actively blocked by US carriers. If you haven't registered for 10DLC yet, your SMS reminders may already be failing to deliver.
How 10DLC Registration Works
There are two parts to the process. Appointment Reminder handles the campaign registration for you — you just need to complete the brand registration.
Brand Registration
Every business or sole proprietor must register their brand with The Campaign Registry (TCR). This verifies your business identity.
Campaign Registration
Campaign registration is a manual verification process performed by a third-party vendor approved by mobile carriers. This confirms the type of messages you're sending.
Toll-Free Numbers: An Alternative
When you sign up for Appointment Reminder, you're allocated a dedicated toll-free number for your business. Toll-free numbers have their own verification process (separate from 10DLC) and generally offer better delivery rates in our testing.
Both 10DLC and toll-free registration are included at no extra cost on every Appointment Reminder plan. We handle the registration process so you can focus on running your practice.
Common Registration Issues
Most registration failures are caused by small details that are easy to fix. Here are the most common issues we see.
Business Name Mismatch
Your legal business name must exactly match the name on your IRS EIN confirmation letter (SS-4). Even small differences like abbreviations or punctuation can cause a failure.
EIN Number Incorrect
Double-check your EIN against your IRS SS-4 letter. A single wrong digit will cause brand registration to fail.
Website Issues
You must have a working website or online presence. The website is used to verify your company and confirm opt-in methods for messaging.
Missing Consent Language
If your website has any forms collecting phone numbers, you must include messaging consent language — even if those forms aren't for appointment reminders.
Business Address Mismatch
The address you provide must match the address on file with the IRS through your EIN. Use the exact city, state, and zip code from your IRS documentation.
Required Consent Language
Any form on your website that collects phone numbers must include consent language. We recommend adding this near the phone number field or as part of a checkbox:
"By providing your phone number, you agree to receive text messages from [YOUR COMPANY NAME]. Message and data rates may apply. Message frequency varies."
This applies to all forms that collect phone numbers — contact forms, booking forms, intake forms — not just forms directly related to appointment reminders. If the phone number field is optional, make sure it's clearly marked as such.
How Appointment Reminder Handles 10DLC
We've simplified the process so you can get registered and back to focusing on your business.
Simple Registration Form
One form at app.appointmentreminder.com/10dlc — takes a few minutes to complete.
We Handle Campaign Registration
We submit and manage your campaign registration with the carriers on your behalf.
Toll-Free Included
Every account gets a dedicated toll-free number with registration included at no extra cost.
Proactive Support
We notify you if there are any issues with your registration and help you resolve them.
Frequently Asked Questions
Ready to get started?
Start your 14-day free trial and we'll help you through the 10DLC registration process. Every plan includes 10DLC and toll-free registration at no extra cost.
Cancel anytime. HIPAA compliant. 10DLC registration included.