SMS marketing used to be simple. Now there’s 10DLC registration, brand verification, and compliance hoops to jump through. Here’s what you need to know.
If you’re using text messages to reach customers—or planning to start—you’ve probably encountered the term “10DLC” and wondered what it means for your business.
Maybe your messaging provider sent you an urgent email about registration deadlines. Maybe your SMS campaigns suddenly stopped delivering messages. Or maybe you’re just trying to understand why sending business texts has become so complicated.
Here’s the reality: SMS marketing has changed dramatically in the past few years. What used to be as simple as loading a list and hitting send now requires brand registration, campaign verification, and compliance with carrier-specific rules.
The reason? Carriers like AT&T, T-Mobile, and Verizon got fed up with spam texts flooding their networks. They implemented 10DLC as a way to separate legitimate businesses from spammers and ensure that consumers only receive texts they’ve actually agreed to receive.
For business owners, this means more paperwork and more complexity. But it also means better deliverability for companies that play by the rules—and severe consequences for those that don’t.
10DLC (10-Digit Long Code) is a carrier-approved messaging system that allows businesses to send application-to-person (A2P) text messages using standard 10-digit phone numbers. It requires registration and brand verification to ensure compliance, reduce spam, and improve SMS deliverability.
In this guide, we’ll explain exactly what 10DLC is, why carriers require it, how the registration process works, and what you need to do to keep your SMS campaigns compliant and delivering.
Whether you’re just getting started with business texting or you’ve been running SMS campaigns for years, understanding 10DLC is essential for protecting your marketing channel and reaching your customers.
Let’s break it down.
The Problem Carriers Were Trying to Solve
To understand 10DLC, you first need to understand the problem that led to its creation.
For years, businesses discovered that SMS was an incredibly effective marketing channel. Text messages have open rates above 90%, compared to 20-30% for email. People read texts within minutes of receiving them. And the cost per message was relatively low.
This created a gold rush. Everyone from legitimate businesses to outright scammers started sending promotional texts. The volume exploded.
Here’s what mobile carriers like AT&T, T-Mobile, and Verizon were dealing with:
Spam text overload: Consumers were bombarded with unwanted promotional messages, scams, phishing attempts, and robotic spam. Complaints skyrocketed.
Network congestion: High-volume messaging campaigns—often sent through automated systems—were clogging carrier networks. Legitimate person-to-person messages got delayed because business traffic was overwhelming the system.
Consumer trust erosion: When your phone buzzes constantly with spam texts, you start ignoring all messages from unknown numbers. This hurts legitimate businesses trying to communicate with customers.
Difficulty identifying bad actors: Carriers had no systematic way to distinguish between a local restaurant sending appointment reminders and a scammer running a phishing scheme. Both looked the same from a technical perspective.
Regulatory pressure: The FCC and state regulators were pushing carriers to do more to protect consumers from unwanted texts and scams.
Carriers realized they needed a framework to:
- Identify who’s sending business messages
- Verify that businesses are legitimate
- Set appropriate messaging limits based on use case
- Filter out spam while allowing legitimate messages through
- Hold businesses accountable for their messaging practices
The solution they developed was A2P 10DLC—a registration and vetting system for businesses that want to send text messages at scale.
Instead of treating all texts the same, carriers now categorize traffic based on whether it’s person-to-person (P2P) or application-to-person (A2P). Business messaging falls into the A2P category and requires registration, verification, and compliance with specific rules.
Think of it like the difference between sending a personal email and running an email marketing campaign. Both use the same underlying technology, but the latter requires proper authentication, opt-in management, and compliance with CAN-SPAM laws.
10DLC does the same thing for SMS.
Breaking Down the Term “10DLC”
Let’s decode the terminology so you understand exactly what we’re talking about.
10-Digit Long Code
A “long code” is a standard phone number—the kind you’re used to seeing: (555) 123-4567. It has 10 digits (in the US) and looks like a regular phone number.
This distinguishes it from “short codes”—those 5-6 digit numbers like 12345 that businesses use for high-volume texting. Short codes have always required registration and vetting. They’re designed specifically for A2P messaging and can send hundreds of messages per second.
Long codes, on the other hand, were originally intended for person-to-person communication. One person texts another person using their regular phone number.
Application-to-Person (A2P)
“Application-to-person” means a business application or automated system is sending messages to individual people.
Examples include:
- Marketing promotions
- Appointment reminders
- Order confirmations
- Customer service notifications
- Two-factor authentication codes
- Account alerts
This contrasts with “person-to-person” (P2P) messaging, where actual humans are texting each other manually.
Why the distinction matters:
Before 10DLC, businesses were using regular 10-digit phone numbers to send A2P messages at scale. They’d load thousands of contacts into a messaging platform and blast promotional texts using what looked like a personal phone number.
Carriers couldn’t effectively regulate this because they couldn’t distinguish between:
- Sarah texting her friend about dinner plans (P2P, totally fine)
- A business sending 10,000 promotional texts (A2P, needs regulation)
Both activities looked identical from a technical perspective.
10DLC solves this by requiring businesses to register their 10-digit long code numbers for A2P use. Once registered, carriers know this is a business number used for automated messaging, and they can apply appropriate rules and throughput limits.
So, when we talk about “10DLC,” we’re referring to the system that allows businesses to legally and effectively send text messages using standard phone numbers—as long as they register properly and follow the rules.
Call Logic helps businesses navigate SMS compliance while maintaining effective outbound communication. Call for your free consultation today to learn how we can help!
The 10DLC Registration Process
Here’s what you actually need to do to use 10DLC for business texting.
The registration happens through a centralized system called The Campaign Registry (TCR). This is a third-party organization that wireless carriers collectively designated to manage business SMS registration.
Think of TCR as the DMV for business texting—you go through them to get licensed to send messages on carrier networks.
Step 1: Register Your Brand
First, you register your business entity. This includes:
- Legal business name
- Tax ID (EIN)
- Business address
- Industry classification
- Stock ticker (if publicly traded)
- Contact information
TCR verifies your business is legitimate by checking your information against business databases and public records. This process helps ensure you’re a real company, not a shell entity created for spam.
Sole proprietors can register using their personal information if they don’t have a formal business entity, though this may result in lower trust scores.
Step 2: Register Your Campaign
After your brand is verified, you register each specific use case or “campaign” for sending messages.
Common messaging categories include:
- Marketing: Promotional offers, sales announcements, product launches
- Customer care: Support messages, account updates, service notifications
- 2FA (Two-factor authentication): Security codes and login verification
- Account notifications: Alerts about account activity, balance updates
- Higher education: School communications, campus alerts
- Mixed: Multiple use cases from the same number
Each campaign registration requires:
- Description of the messaging use case
- Sample message content
- Expected volume
- Opt-in process documentation
- Opt-out mechanism
Be specific and accurate. Vague campaign descriptions or misrepresenting your use case can lead to rejection or filtering.
Step 3: Get Approved and Assigned Throughput
Once your campaign is registered, TCR and the carriers review it and assign:
- A trust score based on your business verification
- Message throughput limits (how many messages per minute/day you can send)
- Tier classification that affects deliverability and filtering
Higher trust scores receive better throughput and less filtering. Factors affecting trust include:
- Business age and size
- Industry reputation
- Verification level
- Previous messaging history
Step 4: Start Sending (Compliantly)
After approval, you can begin sending messages through your registered 10DLC number. But registration alone isn’t enough—you must maintain compliance with ongoing requirements.
Important notes:
The entire registration process typically takes 1-2 weeks but can take longer if your business information needs additional verification.
Registration fees vary but generally include:
- One-time brand registration fee ($4-$15 depending on volume)
- Monthly campaign fees ($2-$10 per campaign)
- Carrier pass-through fees
If you’re working through a messaging platform or provider, they often handle the technical aspects of registration on your behalf—but you’re still responsible for providing accurate information and maintaining compliance.
What Businesses Must Do to Stay Compliant
Registering for 10DLC is just the beginning. Staying compliant requires ongoing attention to how you collect consent, send messages, and manage opt-outs.
Register brand and campaign
We covered this in the previous section, but it’s worth emphasizing: Operating without proper 10DLC registration will get your messages blocked or heavily filtered. This isn’t optional.
If you’re using multiple phone numbers for business texting, each number needs to be registered. If you’re running different types of campaigns (marketing + customer service, for example), you may need separate campaign registrations.
Clearly disclose opt-in language
Before you can send marketing texts to someone, you need their explicit consent. And that consent must be clear, conspicuous, and specific.
Good opt-in language: “By entering your phone number and clicking Submit, you agree to receive promotional text messages from [Business Name] at the number provided. Message frequency varies. Message and data rates may apply. Reply STOP to opt out.”
Bad opt-in language: “Stay connected!” (buried in fine print with other terms)
Your opt-in must:
- Clearly state the person will receive text messages
- Identify your business by name
- Explain it’s for marketing if that’s the use case
- Disclose message frequency expectations
- Note that message/data rates may apply
- Provide opt-out instructions
Don’t hide consent in terms and conditions. Don’t pre-check boxes. Don’t assume consent from other communication channels.
Maintain opt-out mechanisms
Every marketing text must include clear instructions for opting out—and you must honor opt-out requests immediately.
Standard practice:
- Include “Reply STOP to opt out” in every message (or at least periodically)
- Process STOP, UNSUBSCRIBE, CANCEL, QUIT, and similar keywords
- Remove the contact from your list within 24 hours
- Send a confirmation message acknowledging the opt-out
- Never message them again unless they explicitly re-opt-in
Some businesses try to get cute with opt-out requirements. Don’t. Making it hard to unsubscribe is not only poor customer service—it’s a compliance violation that carriers take seriously.
Avoid prohibited content
Certain types of content are restricted or prohibited in SMS campaigns:
Not allowed:
- Cannabis/marijuana promotions (even in legal states)
- Get-rich-quick schemes
- Payday loans or high-interest lending
- Debt relief or credit repair
- Work-from-home opportunities
- Phishing or fraudulent content
- Adult content
- Firearms and ammunition (in most cases)
Even if your core business is legal, promoting certain products or services via SMS can violate carrier policies.
When in doubt, check with your messaging provider about whether your content is permissible.
Follow throughput limits
Your 10DLC campaign is assigned specific messaging limits based on your trust score and campaign type. Exceeding these limits results in message queuing, delays, or blocking.
Typical limits range from:
- Low trust: 75 messages per minute
- Standard: 240-360 messages per minute
- Higher trust: 1,500+ messages per minute
If you need higher throughput, you have options:
- Improve your trust score through business verification
- Use multiple registered numbers
- Consider short codes for very high-volume campaigns
Don’t try to circumvent limits by spreading messages across unregistered numbers. Carriers detect this and will block all your traffic.
How 10DLC Compares to Other SMS Options
10DLC isn’t the only way to send business texts. Let’s compare it to the alternatives so you can choose the right option for your needs.
10DLC vs. Short Codes
Short codes are 5-6 digit numbers (like 12345) designed specifically for high-volume A2P messaging.
Short codes:
- Pros: Very high throughput (100+ messages per second), premium deliverability, recognized as business numbers
- Cons: Expensive ($1,000-$5,000+ per month), lengthy approval process (6-12 weeks), shared short codes being phased out
- Best for: Large enterprises, high-volume campaigns (millions of messages), brands that need maximum reliability
10DLC:
- Pros: Much lower cost ($10-50/month), faster approval (1-2 weeks), looks like a regular phone number
- Cons: Lower throughput limits, may be filtered more aggressively, requires registration
- Best for: Small to mid-sized businesses, moderate volume campaigns, two-way conversations
Most businesses find 10DLC sufficient for their needs. Short codes make sense primarily for very large-scale operations or when you absolutely need maximum deliverability.
10DLC vs. Toll-Free Numbers
Toll-free numbers (starting with 800, 888, 877, etc.) can also be used for business texting with proper verification.
Toll-free SMS:
- Pros: No per-campaign registration, simpler verification process, good for customer service
- Cons: Lower throughput than 10DLC, less suitable for marketing, may have higher per-message costs
- Best for: Customer service, appointment reminders, transactional messages
10DLC:
- Pros: Higher throughput, better for marketing, can use local numbers
- Cons: More complex registration, campaign-specific requirements
- Best for: Marketing campaigns, promotional texts, mixed-use messaging
If you’re primarily doing customer service and transactional messaging, toll-free numbers might be simpler. For marketing-focused SMS campaigns, 10DLC is generally the better choice. Ultimately, choose based on your volume, budget, and use case—not just on what seems easiest.
Risks of Non-Compliance
What happens if you ignore 10DLC requirements and just start sending texts? Nothing good.
Carrier filtering
Unregistered business messaging gets flagged by carrier spam filters. Your texts either don’t deliver at all, or they arrive with warning labels that destroy engagement.
Filtering happens automatically based on:
- High message volume from unregistered numbers
- Repetitive content patterns
- Consumer spam reports
- Failure to match known 10DLC registrations
Once you’re filtered, getting unblocked is difficult and time-consuming.
Message blocking
Carriers can completely block messages from non-compliant senders. Your texts simply disappear into the void—not delivered, not queued, just gone.
You might not even know it’s happening until customers start complaining they never received your messages.
Increased fees
Many messaging providers charge additional fees for unregistered traffic or may refuse to send your messages entirely. Those that do send unregistered messages often apply premium pricing because of the higher risk.
You could be paying 2-3x as much per message while getting worse deliverability.
Campaign suspension
If you do register but violate compliance rules, carriers can suspend your campaign. This means:
- All messaging stops immediately
- You must go through a remediation process
- Re-approval can take weeks
- Your business is flagged for increased scrutiny
Suspension happens when carriers detect:
- Sending prohibited content
- Exceeding throughput limits repeatedly
- High spam complaint rates
- Misrepresenting your campaign use case
Deliverability issues
Even if your messages technically “send,” non-compliance leads to poor deliverability:
- Messages delayed by hours or days
- Inconsistent delivery across carriers
- Higher message failure rates
- Texts landing in spam folders (on supported devices)
Poor deliverability means your SMS campaign simply doesn’t work. You’re wasting money on messages that never reach customers.
The bottom line: The risks of non-compliance far outweigh the hassle of proper registration. Don’t gamble with your messaging channel.
10DLC vs TCPA Compliance
It’s important to understand that 10DLC and TCPA are different things that both apply to your SMS marketing.
TCPA (Telephone Consumer Protection Act):
- Federal law enforced by the FCC
- Governs all telemarketing, including SMS
- Requires prior express written consent for marketing texts
- Mandates opt-out mechanisms
- Enforced through lawsuits and regulatory action
- Violations can cost $500-$1,500 per message
10DLC:
- Carrier requirement, not a law
- Implemented by AT&T, T-Mobile, Verizon, and other mobile carriers
- Requires brand and campaign registration
- Sets messaging throughput limits
- Enforced through filtering, blocking, and suspension
- Violations result in deliverability issues
The relationship:
TCPA compliance is about getting legal permission to send messages and respecting consumer rights. It’s the law.
10DLC compliance is about registering your business and following carrier technical requirements. It’s a business rule.
You need both.
You can be perfectly compliant with TCPA (you have consent, you honor opt-outs, you follow all the rules) but still have your messages blocked if you haven’t registered for 10DLC.
Conversely, you can register for 10DLC but still face TCPA lawsuits if you send messages to people without proper consent.
Think of it this way:
- TCPA = Legal permission to send messages
- 10DLC = Technical approval to deliver those messages
Both are essential. Neither is optional.
10DLC Compliance Checklist
Use this checklist to ensure your SMS campaigns are fully compliant:
✅ Register your brand Submit your business information through The Campaign Registry (TCR). Verify your legal business name, EIN, and business details are accurate.
✅ Register each campaign use case Create separate campaign registrations for different messaging purposes (marketing, customer service, etc.). Provide honest descriptions and sample messages.
✅ Keep opt-in proof Document how and when you obtained consent from each contact. Store records of opt-in forms, timestamps, and consent language used.
✅ Include opt-out instructions Add “Reply STOP to opt out” or similar language to every marketing message. Process opt-outs immediately and automatically.
✅ Monitor message rejection codes Track delivery reports and rejection reasons. Investigate patterns of failed messages and address root causes.
✅ Avoid shared long codes Don’t use the same 10DLC number that other businesses are using. Each business should have dedicated registered numbers.
✅ Stay updated on carrier changes Carrier policies evolve. Subscribe to updates from your messaging provider and TCR. Review compliance requirements quarterly.
Additional best practices:
- Test your messages across different carriers before launching campaigns
- Keep your contact lists clean and up-to-date
- Monitor spam complaint rates and address issues promptly
- Maintain consistent messaging that matches your registered campaign
- Don’t send messages outside of reasonable hours (generally 8am-9pm local time)
Compliance isn’t a one-time task—it’s an ongoing commitment that protects your business and ensures your messages reach customers.
Making 10DLC Work for Your Business
10DLC registration might feel like bureaucratic overhead, but it’s actually good news for legitimate businesses.
Here’s why:
Better deliverability: Properly registered 10DLC messages have much higher delivery rates than unregistered traffic. You’re working with carriers instead of against them.
Clearer rules: Before 10DLC, SMS compliance was a gray area. Now you have clear guidelines about what’s allowed and what’s not.
Competitive advantage: Many of your competitors haven’t properly registered or are still using outdated methods. Your messages get through while theirs get blocked.
Consumer trust: When carriers can verify your business and campaign, they’re more likely to deliver your messages without spam warnings. This builds trust with recipients.
Sustainable channel: 10DLC creates a framework that allows SMS marketing to continue as an effective channel instead of being destroyed by spam.
The businesses that embrace 10DLC registration and compliance will maintain SMS as a powerful marketing tool. Those that ignore it or try to work around it will find their messages increasingly blocked and their campaigns ineffective.
Yes, there’s paperwork involved. Yes, there are ongoing compliance requirements. But the alternative—losing access to one of your most effective communication channels—is far worse.
If you haven’t registered yet, make it a priority this week. If you have registered, review your compliance practices to ensure you’re following all the rules.
Your customers want to hear from you. 10DLC ensures they actually receive your messages.
Call Logic understands the complexities of modern communication compliance. Whether you’re managing outbound calls, SMS campaigns, or both, we help you stay compliant while maximizing effectiveness. Call for your free consultation today!
