What Is 10DLC? The Complete Guide to 10-Digit Long Code
Many businesses are adapting to SMS and MMS messaging as one of the most potent tools for catching customers’ attention directly. 10DLC is the advancement of A2P messaging — created in direct response to the need for compliant, well-organized, and cost-effective business texting across US carrier networks.
What Is 10DLC & A2P Messaging?
A2P (Application-to-Person) messaging is a form of communication in which a software application sends messages to a mobile phone user. These messages are commonly one-way — used for delivery alerts, two-step verification codes, promotional offers, account notifications, and more.
10DLC (10-digit long code) numbers are local long code phone numbers that mobile network providers approve for A2P messaging. Approval is given when the local long code number and a verified 10DLC brand and campaign are registered.
A 10DLC brand refers to the business organization authorized to send text messages. A 10DLC campaign is the specific type of communication initiative linked to that brand’s marketing initiative — both are part of a system designed for regulating business-to-consumer SMS messaging within the United States.
Benefits of 10DLC for Business Messaging
With 10DLC numbers, businesses get the capacity to send bulk text messages while keeping operating costs low — with higher delivery, better compliance, and instant customer trust.
Higher SMS Traffic & Faster Delivery
10DLC phone numbers reduce the gap between the limitations of toll-free long codes and short code numbers, ensuring messages are sent quickly to the target audience on time.
Reduce Cost with Flexibility
10DLC comes at a budget-friendly price compared to short codes. Businesses can convert existing phone lines to 10DLC numbers and send more messages without incurring more costs.
Messages Delivered as per Compliance
Pre-approved by network operators, 10DLC numbers establish better compliance with carrier regulations — ensuring messages reach intended recipients without problems.
Better Reputation Scores via TCR
The Campaign Registry (TCR) manages A2P 10DLC registration. Better reputation scores lead to mobile carriers giving your messages appropriate priority — not caught in spam filters.
Instant Trust
Customers are more likely to trust messages from a local phone number — it feels familiar and genuine, like a text from your favorite restaurant or doctor’s office.
Customer-First Approach
10DLC helps customers start conversations and interact with your brand as if they are talking to a person or customer support — building stronger customer relationships and loyalty.
Getting Started with 10DLC Registration in 4 Steps
VoIP Office simplifies the 10DLC registration process, ensuring fast approvals with an easy setup option — Helps reduce the risk of carrier surcharges, filtering, and compliance violations.
Submit Business Info
Provide company name, type, industry, EIN, registered physical address, phone number, and email for brand verification.
Register Your Brand
Register your business as a 10DLC brand with TCR — the organization authorized to send A2P text messages on your behalf.
Register Your Campaign
Define your messaging use case — marketing, notifications, or customer support — with sample message content and opt-in/opt-out proof.
Start Compliant Messaging
Once approved, send bulk SMS and MMS via your 10-digit long code with higher deliverability and full carrier compliance.
Types of Business Messaging Numbers
Almost all American business entities can send messages from three types of numbers — here’s how they compare and why 10DLC is the ideal choice for present-day A2P messaging.
Toll-Free Long Codes
Affordable two-way SMS in large volumes. Good for company branding with vanity numbers like 1-833-VoIP. Registration is compulsory.
Short Codes
Best for high-density volume campaigns from a recognizable 5–6 digit number. Fast throughput but higher setup and maintenance costs.
10DLC Numbers
The ideal choice for A2P messaging — balancing volume, cost, and compliance without the drawbacks of short codes or P2P long codes.
A2P Messaging
Application-to-Person texting lets businesses communicate with groups at once — delivery alerts, OTPs, promotions, and account notifications.
TCR Registration
The Campaign Registry manages A2P 10DLC registration — improving deliverability, reducing spam, and ensuring regulatory compliance.
Business SMS & MMS
Send and receive SMS from your business number with scheduling, templates, automated follow-ups, and full 10DLC compliance built in.
Toll-Free vs Short Codes vs 10DLC
See why 10DLC positions itself as the ideal choice for present-day A2P messaging — overcoming the limitations of other number types.
| Feature | Toll-Free | Short Codes | 10DLC |
|---|---|---|---|
| Setup Cost | Low | High setup & maintenance | Budget-friendly |
| Message Volume | High output rates | Very high throughput | High volume supported |
| Two-Way Messaging | Supported | Supported | Supported |
| Voice Calls | Available | SMS only | Available |
| Local Presence | Toll-free only | 5–6 digits only | Local 10-digit numbers |
| A2P Compliance | Registration required | Compliant | Approved after successful brand and campaign registration. |
| Customer Trust | Good for branding | Recognizable but impersonal | Feels familiar & genuine |
| Spam Filter Risk | Moderate | Can get caught in filters | Better inbox delivery |
| Convert Existing Lines | New number needed | New number needed | Convert landlines easily |
| US Carrier Mandate | Registration compulsory | Available | Required by participating U.S. wireless carriers for most business A2P messaging using +1 long code numbers. |
Why Was My 10DLC Campaign Rejected?
Understand the most common 10DLC campaign rejection reasons and what businesses can check before correcting and resubmitting a campaign.
A 10DLC campaign can be rejected when the information submitted during registration does not clearly match the business, website, consent process, or intended messaging use case. Reviewing these common rejection reasons before submission can help reduce delays and unnecessary resubmissions.
| Common Rejection Reason | Why It Can Cause a Problem | How to Improve the Submission |
|---|---|---|
| Missing Privacy Policy | The website does not provide an accessible privacy policy explaining how customer information is collected, used, or handled. | Add a clear Privacy Policy to the website and make sure it is accessible from the opt-in experience and other appropriate locations. |
| Missing or Unclear Opt-In | The campaign does not clearly show how recipients provide consent to receive SMS messages, or the submitted opt-in workflow cannot be verified. | Provide a clear opt-in method and explain exactly how customers consent. Include appropriate SMS disclosures and retain evidence of consent. |
| SHAFT / Restricted Content | Campaign content associated with restricted or prohibited categories may be rejected or heavily restricted by carriers and messaging providers. Policies can vary by provider and carrier. | Review the content policies that apply to your provider, campaign, and destination carriers before submitting. Do not attempt to disguise or misclassify restricted content. |
| Inconsistent Website Information | The company name, brand, services, contact information, domain, or other website details do not align with the information submitted during brand or campaign registration. | Make sure the website clearly represents the registered business and that submitted brand, contact, and campaign information is accurate and consistent. |
| Wrong or Inaccurate Use Case | The selected campaign use case does not accurately describe the messages the business intends to send. | Select the use case that best matches the actual messaging program and make the campaign description specific and consistent with the sample messages. |
| Shared URL Shorteners | Public or shared URL-shortening domains can make destinations harder to identify and may create trust, filtering, or compliance concerns. | Use clear business-owned URLs or provider-supported branded links when links are necessary. Avoid generic shared URL shorteners in campaign samples and live traffic where prohibited. |
| Missing or Poor Sample Messages | Sample messages are missing, too vague, or do not reflect the actual content that recipients will receive. | Provide realistic sample messages that identify the brand and accurately represent the registered use case, including relevant opt-out language where appropriate. |
How to Reduce the Risk of 10DLC Rejection
Before submitting a campaign, review the registration as if you were a carrier or campaign reviewer. The business identity, website, selected use case, opt-in process, privacy information, and sample messages should tell the same consistent story. Avoid submitting incomplete information simply to get the campaign registered faster, because inconsistencies can lead to rejection or additional review.
If a campaign is rejected, review the rejection reason provided by your messaging provider before resubmitting. Correct the underlying issue first, then update the registration so the website, consent workflow, campaign description, and sample messages accurately reflect the messaging program.
Who Needs 10DLC?
If your organization uses a U.S. 10-digit long code to send application-to-person business SMS or MMS, 10DLC registration may apply. Here are common examples of organizations that use 10DLC messaging.
Dental Clinics
Send appointment reminders, confirmations, rescheduling notices, follow-ups, and other patient communications from a registered business number.
Schools
Send attendance alerts, schedule changes, event reminders, administrative notices, and other important updates to opted-in recipients.
Banks & Financial Services
Use registered messaging for eligible account alerts, authentication notifications, service updates, and customer communications, subject to applicable compliance requirements.
SaaS Companies
Send login verification codes, account notifications, product updates, support messages, and other application-generated customer communications.
Real Estate Agencies
Communicate with opted-in prospects and clients about property inquiries, showing reminders, appointment updates, and transaction-related notifications.
Restaurants
Send reservation confirmations, pickup notifications, order updates, loyalty messages, and promotional offers to customers who have provided appropriate consent.
Delivery Companies
Send dispatch notifications, delivery status updates, arrival alerts, tracking information, and customer service messages at scale.
Medical Offices
Use business messaging for appointment reminders, office notifications, scheduling updates, and other permitted patient communications while following applicable privacy and messaging requirements.
10DLC Registration Workflow
Understand the complete A2P 10DLC process—from business and brand registration to campaign registration, carrier review, customer opt-in, message routing, and final SMS delivery to the recipient’s mobile device.
Business creates an account and prepares the required company details.
Register the business brand with The Campaign Registry (TCR).
Register the SMS campaign and the intended messaging use case.
Campaign information is reviewed under applicable carrier and messaging requirements.
Once the campaign is enabled, compliant messages can be sent to recipients.
The customer provides the appropriate consent to receive SMS messages.
The messaging platform processes the message and routes it toward the carrier network.
The wireless carrier applies network controls and routes the message to the recipient.
The SMS message is delivered to the customer’s mobile device.
10DLC: Is It for You?
10DLC applies to many businesses with specific messaging needs — from balancing volume and cost to staying compliant and avoiding carrier fines.
Smart Messaging Choice
Companies balancing volume and cost between short codes and toll-free long codes — 10DLC offers higher throughput without high short code costs.
Budget-Friendly Messaging
Low-cost alternative to short code numbers — ideal for companies looking for budget-friendly bulk messaging solutions.
Stay Compliant & Avoid Fines
Carriers pre-approve 10DLC numbers following strict message regulations — reducing violations and keeping messages secure.
Flexible Messaging Solution
Convert landlines for bulk messaging without changing your phone number — adjusting to changing volumes without high overhead.
Retail & E-Commerce
Promotional SMS campaigns, order updates, and delivery alerts sent from trusted local numbers customers recognize.
Healthcare
Appointment reminders, patient notifications, and account alerts delivered compliantly via registered 10DLC campaigns.
Logistics & Delivery
Real-time delivery alerts and tracking updates sent at scale with high deliverability and fast throughput.
Customer Support
Two-way support conversations from local numbers — helping customers interact with your brand like talking to a real person.
Understanding 10DLC & the Scope of Business Text Messaging
When 10DLC is adopted, it helps achieve higher delivery rates, better compliance, and a wide reach, along with cost savings. For carriers supporting business messaging, 10DLC is essential. A 10DLC registered long code number helps support a large volume of text messages — all carriers in America have made it mandatory for businesses using A2P messaging services to use 10DLC registered numbers on their networks.
Advancement of Business Text Messaging
Many phone number providers did not have the facility to send mass SMS messages until the late 2010s due to compliance issues, limited reach, and inefficient communication. Later, telecom providers and regulatory bodies collaborated and introduced phone numbers that could handle bulk messaging.
At present, the most budget-friendly way for businesses to send bulk SMS to customers is through A2P (application-to-person) texting. The advent of A2P has helped remove the manual texting process — now businesses can send bulk text messages efficiently.
Local long-code phone numbers were mainly designed for P2P (Person-to-Person) texting with limited messaging volume. Using them for A2P messaging could breach CTIA guidelines, leading to compliance concerns. Short codes handle high-volume traffic but are overburdened with high setup costs. 10DLC was created to overcome all of this — introduced in 2021 and now compulsory for businesses sending long text messages in the USA using (+1) long code numbers.
Scope of 10DLC
10DLC helps businesses send A2P text messages using long local codes in America. Telecom carriers established the concept to provide an accredited plan of action for businesses to send SMS and MMS messages using long codes — protecting customers from undesirable spam while allowing businesses to better connect with them.
This improved SMS delivery performance since it helps in connecting better with customers and sending more messages than P2P (peer-to-peer). Customers are protected from unwanted spam, which helps businesses connect with prospective customers.
TCR — The Campaign Registry
TCR (The Campaign Registry) helps manage A2P 10DLC messaging registration for businesses in America. It improves message deliverability, reduces spamming, and ensures compliance with regulations. Businesses must register their brand (business sending messages) and campaigns (messaging use cases like promotions or alerts) to become eligible to send SMS/MMS via 10-digit long codes.
Due to better deliverability, 10DLC messages reach the customer’s inbox — unlike short code messages that can get caught in spam filters. Better reputation scores allocated by TCR lead to mobile carriers giving messages appropriate priority.
What Is CTIA and Why Does It Matter for 10DLC?
CTIA (Cellular Telecommunications Industry Association) is the U.S. wireless industry association that publishes messaging best practices designed to protect consumers and support a trustworthy messaging ecosystem. Its messaging guidelines influence how businesses, messaging providers, and wireless carriers handle application-to-person (A2P) SMS and MMS traffic.
For businesses using 10DLC messaging, following CTIA messaging practices is important because registering a brand and campaign does not remove the responsibility to follow consumer-protection and carrier requirements. Businesses should clearly identify themselves, send messages only for the purposes customers agreed to, respect opt-out requests, and avoid misleading, deceptive, or unwanted messaging.
CTIA Carrier Messaging Principles
CTIA’s messaging principles are designed around providing consumers with a safe, transparent, and trusted messaging experience. Wireless carriers and messaging providers may use these principles, together with their own policies and applicable laws, when evaluating business messaging traffic.
| Principle | What It Means |
|---|---|
| Consumer Choice | Consumers should have control over which businesses can send them messages and should be able to stop messages easily. |
| Consumer Consent | Businesses should obtain appropriate consent before sending A2P messages and maintain records showing how that consent was collected. |
| Clear Identification | Messages should make it clear which business or organization is communicating with the recipient. |
| Opt-Out Support | Businesses should honor common opt-out requests such as STOP and discontinue applicable messaging promptly. |
| Relevant Messaging | Messages should remain consistent with the purpose and use case for which the customer provided consent. |
| Consumer Protection | Messaging programs should avoid spam, deceptive content, prohibited content, and practices that could harm or mislead recipients. |
Following these principles can help businesses reduce complaints, carrier filtering, campaign suspension, and other messaging compliance problems. However, CTIA guidelines do not replace applicable federal or state laws or individual carrier requirements.
10DLC Consent Requirements
Customer consent is one of the most important parts of compliant A2P messaging. Before sending messages, businesses should obtain the appropriate level of consent for their messaging use case. The required consent can vary depending on whether messages are informational, conversational, transactional, or promotional and on the laws and carrier policies that apply.
Businesses should clearly explain what customers are signing up to receive. An opt-in form or other consent process should identify the business, describe the type of messages the customer can expect, and provide any disclosures required for that messaging program.
- Obtain appropriate consent before sending A2P SMS or MMS messages.
- Clearly disclose the business or brand associated with the messaging program.
- Explain what types of messages customers are agreeing to receive.
- Do not treat consent for one messaging purpose as automatic permission for unrelated campaigns.
- Keep records showing when and how customers provided consent.
- Provide clear opt-out instructions and honor applicable STOP requests promptly.
- Do not purchase or use third-party contact lists as a substitute for valid consumer consent.
10DLC registration and customer consent are separate requirements. Registering a brand and campaign through TCR helps carriers identify legitimate A2P traffic, but registration by itself does not mean a business has permission to message every customer. Businesses remain responsible for obtaining and maintaining appropriate consent and complying with applicable messaging laws and carrier policies.
SMS Compliance Requirements for 10DLC Messaging
10DLC registration is only one part of compliant business messaging. Businesses should also maintain a clear consent process and provide customers with the disclosures that apply to their SMS or MMS program.
| Requirement | What It Means | Recommended Disclosure / Action |
|---|---|---|
| Express Consent | Obtain appropriate permission before sending business SMS or MMS. The consent request should clearly identify the business and explain what the customer is agreeing to receive. | Keep a record of when, where, and how the customer opted in. Marketing campaigns may require additional consent considerations under applicable law. |
| STOP | Recipients need a clear and simple way to opt out of applicable messaging. | Reply STOP to unsubscribe. Honor applicable opt-out requests promptly. |
| HELP | Recipients should have a way to request assistance or information about the messaging program. | Reply HELP for help. The HELP response should provide useful support or contact information. |
| Message Frequency | Tell customers approximately how often they may receive messages from the program. | Message frequency varies. Use more specific wording when the campaign has a fixed schedule. |
| Message & Data Rates | Customers should understand that their mobile carrier or service plan may apply messaging or data charges. | Message and data rates may apply. |
| Privacy Policy | Provide easy access to information explaining how customer information is collected, used, and protected. | View VoIP Office Privacy Policy |
| Terms of Service | Provide access to the terms governing the messaging program and related services. | View VoIP Office Terms & Conditions |
Example SMS Program Disclosure
Example Opt-In Disclosure
By opting in, you agree to receive SMS messages from VoIP Office related to the messaging program you selected. Message frequency varies. Message and data rates may apply. Reply STOP to unsubscribe or HELP for help. View our Privacy Policy and Terms & Conditions.
Important: Publishing these disclosures does not by itself create valid consent. Businesses should collect and retain appropriate consent, keep messaging consistent with the consent provided, and follow applicable carrier policies and laws.
10DLC Throughput: TPS, Messaging Speed & Carrier Limits
One of the most common questions businesses ask about 10DLC is: How many messages can I send? The answer depends on several factors, including the messaging provider, registered campaign type, brand and campaign status, message type, destination carrier, and carrier-specific policies. 10DLC does not provide one universal sending limit for every business.
What Is TPS (Transactions Per Second)?
TPS stands for Transactions Per Second and is commonly used to describe messaging throughput — the approximate rate at which messages can be submitted or processed. For example, a higher TPS capability generally allows a messaging application to submit more message segments in a shorter period of time.
TPS should not be treated as a guaranteed delivery rate. Actual message delivery can vary because messages pass through messaging platforms, carrier networks, filtering systems, and recipient devices. Long SMS messages may also be divided into multiple message segments, which can affect how messaging traffic is counted or processed.
What Is 10DLC Throughput?
Throughput refers to the rate or capacity at which messaging traffic can be sent through the messaging ecosystem. With A2P 10DLC, throughput can depend on the registered brand, campaign use case, messaging provider, carrier requirements, and other network controls.
A business sending appointment reminders to a smaller customer list may have very different throughput needs from an e-commerce company sending time-sensitive notifications to thousands of customers. Businesses planning large campaigns should therefore evaluate their expected message volume and sending pattern before launch.
Understanding Carrier Limits
Wireless carriers may apply their own throughput limits, daily messaging limits, filtering rules, campaign restrictions, and enforcement policies. These controls can differ by carrier and may change over time. A campaign that can submit traffic at a particular rate through a messaging provider may still be subject to downstream carrier controls.
| Carrier Limit Factor | What It Means |
|---|---|
| Campaign Type | Throughput can vary depending on the registered messaging use case. |
| Brand & Campaign Status | Proper registration and vetting can affect the messaging capabilities available to a campaign. |
| Destination Carrier | Different wireless networks can apply different traffic-management and filtering policies. |
| Message Segments | Longer SMS messages may be split into multiple segments, increasing the number of messaging transactions processed. |
| Traffic Patterns | Sudden spikes, unusual sending behavior, high complaint rates, or non-compliant traffic can trigger filtering or additional restrictions. |
| Messaging Provider | Your provider may also apply platform-level rate limits in addition to carrier requirements. |
How Many 10DLC Messages Can I Send?
There is no single message-per-second or daily-volume number that applies to every 10DLC campaign. Your practical sending capacity depends on your approved campaign, provider capabilities, destination carriers, message segmentation, and current carrier policies.
For businesses with high-volume or time-sensitive messaging requirements, it is important to estimate expected daily message volume, peak sending periods, and campaign use cases before registration. VoIP Office can help businesses evaluate their messaging requirements and configure an appropriate 10DLC messaging setup while accounting for applicable provider and carrier limitations.
Conclusion
Businesses send bulk messages daily, and with 10DLC, businesses have the option for a faster, more trustworthy messaging channel. VoIP Office simplifies the 10DLC registration process, ensuring fast approvals with an easy setup option. The tools we provide help maintain compliance and maximize message deliverability.
Whether a company is transitioning from traditional messaging or scaling up its messaging facility, we provide tools to help businesses optimize their outreach. Take advantage of 10DLC by strengthening customer connections today with the help of VoIP Office.
What Businesses Say About VoIP Office SMS
Companies across America trust VoIP Office for compliant, high-deliverability business messaging powered by 10DLC.
“VoIP Office handled our entire 10DLC brand and campaign registration. Our promotional SMS delivery rates improved dramatically — and we avoided the carrier fines we were worried about.”
Lisa M.
Marketing Director — E-Commerce, Chicago IL
“We converted our existing landline to 10DLC and started sending appointment reminders at scale. Patients trust the local number — it feels like a text from our clinic, not a marketing blast.”
Dr. Robert H.
Clinic Administrator — Phoenix AZ
“Switching from short codes to 10DLC saved us thousands monthly. VoIP Office made the TCR registration process straightforward — we were sending compliant bulk SMS within a week.”
David K.
Operations Manager — Logistics Company, Dallas TX
10DLC Registration Timeline
| Step | Typical Time |
|---|---|
| Brand Registration | Minutes to a few business days |
| Campaign Review | Often several business days (varies) |
| Carrier Approval | Depends on campaign type and carrier |
Frequently Asked Questions — 10DLC
Everything US businesses need to know about 10-digit long code messaging and A2P compliance.
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