On this page
- What is A2P 10DLC, in plain English?
- Who runs the system, and what is The Campaign Registry?
- Why do carriers filter or block unregistered texts?
- How does 10DLC registration work, step by step?
- What information will you be asked for?
- What does compliant opt-in and opt-out language look like?
- What are the most common 10DLC rejection reasons?
- How much texting will you do? A hypothetical worked example
- Is toll-free verification a better alternative to 10DLC?
- Your 10DLC compliance checklist
- What are the common mistakes businesses make with 10DLC?
- Next step
10DLC registration is the process of identifying your business and your texting use case to US mobile carriers so that messages sent from a standard 10-digit number through software are delivered instead of filtered. You register a brand and at least one campaign through your messaging provider, which submits them to The Campaign Registry. Fees, throughput and approval times vary by provider and change over time.
Key takeaways
- A2P 10DLC is the US carrier framework for business texting from ordinary 10-digit phone numbers through software.
- You register through your messaging provider, which submits your brand and campaign to The Campaign Registry on your behalf.
- US carriers filter or block unregistered application-to-person traffic, so registration is a condition of reliable delivery.
- Most rejections come from mismatched business details, a thin website, an unclear opt-in flow or sample messages that do not match the use case.
- Registration does not replace consent: you still need opt-in, STOP and HELP handling, and TCPA-aware practices.
- Toll-free numbers follow a separate verification process and can be a reasonable alternative for some businesses.
10DLC registration is how a US business tells the mobile carriers who it is and what it texts about, so that messages sent from a regular 10-digit number through software actually reach customers. You register a brand and a campaign through your messaging provider, which submits them to The Campaign Registry. Without it, carriers filter or block your texts, often without telling you.
This guide explains the process in plain terms, lists what you will be asked for, and covers the rejection reasons that hold up most small businesses. It is general information, not legal advice. Rules, fees and review times change, so confirm current details with your messaging provider.
What is A2P 10DLC, in plain English?
Two abbreviations make up the term.
A2P means application-to-person. It describes any text message sent by software to a person's mobile phone. If your staff type a reply in a texting platform, or the platform sends an automated appointment reminder, that is A2P. The opposite is P2P, person-to-person, which is one individual texting another from their own handset.
10DLC means 10-digit long code. It is simply a standard local phone number, such as one with a 713 or 512 area code, that has been enabled for business texting.
Put together, A2P 10DLC is the framework US mobile carriers use to allow business texting from ordinary local numbers. Before it existed, businesses that wanted to text at volume mostly used five- or six-digit short codes, which are costly and slow to obtain. The 10DLC framework gave local businesses a sanctioned path, and in exchange the carriers required senders to identify themselves.
The practical effect for a small business: the local number on your sign can also send and receive texts through business texting software, as long as the business and its use case are registered.
Who runs the system, and what is The Campaign Registry?
Several parties are involved, and knowing who does what removes most of the confusion.
| Party | Role in plain terms |
|---|---|
| Your business (the brand) | The sender. You are responsible for consent, content and accurate registration details. |
| Your messaging provider | The texting platform or phone company you buy service from. It collects your details and submits them. In industry terms it acts as, or works through, a campaign service provider. |
| The Campaign Registry | The central registry where brands and campaigns are recorded. Carriers use it to know who is behind the traffic. |
| Mobile carriers | AT&T, T-Mobile, Verizon and others. They set the rules for traffic on their networks and filter or block what does not comply. |
| Your customer | The recipient, whose consent you need and whose STOP request you must honor. |
The Campaign Registry is a company that operates the registration database the US carriers rely on for 10DLC. It is not a government agency. As a small business you do not normally deal with it directly. You fill in a form with your messaging provider, and the provider submits the information on your behalf.
Two other names come up. CTIA is the US wireless industry trade association, and it publishes messaging principles and best practices that carriers and providers follow. The FCC, the Federal Communications Commission, is the federal regulator that enforces the Telephone Consumer Protection Act, known as the TCPA, which governs consent for certain calls and texts. 10DLC is an industry framework. The TCPA is law. You need to respect both.
Why do carriers filter or block unregistered texts?
Carriers want to protect their subscribers from spam and fraud, and text messaging is attractive to scammers because people read texts quickly. Registration ties every stream of business traffic to an identified company and a stated purpose. That lets carriers give known senders better treatment and cut off bad actors at the source.
For an unregistered sender, the consequences usually look like this:
- Messages fail without notice. Your platform may show a message as sent while the carrier discards it. Customers simply never see the reminder.
- Providers refuse to enable texting. Many messaging providers now require an approved registration before a number can send to US mobile phones at all.
- Surcharges or suspensions. Providers may pass through carrier penalties for non-compliant traffic or suspend the number.
Registration also affects how much you can send. Carriers assign sending limits based on the brand and the type of campaign. The specific limits differ by carrier, depend on how your brand is vetted, and have changed over time, so ask your provider what applies to you rather than relying on a number from an article.
It is worth being clear about what registration does not do. It does not guarantee that every message is delivered. Carriers still filter content that looks like spam, even from registered senders. And it does not make non-consensual texting legal or acceptable.
How does 10DLC registration work, step by step?
The exact screens differ between providers, but the sequence is consistent.
- Confirm which numbers need it. Any local 10-digit number that sends texts to US mobile phones through software needs to be covered. Toll-free numbers follow a different process, described later.
- Gather your business identity details. You need your exact legal business name, your Employer Identification Number (EIN), your registered address, and contact details. Pull these from your IRS paperwork so they match.
- Get your website and policies in order. Reviewers look at your website. It should be live, show the same business name, and include a privacy policy and terms that mention text messaging.
- Document your opt-in flow. Decide and write down how customers agree to receive texts from you: a web form, a paper intake form, a keyword, or a verbal request noted by staff.
- Register the brand. Submit the identity details through your messaging provider. The provider forwards them for verification against business records.
- Register a campaign. Choose a use case that describes what you send, write a clear description, provide sample messages, and describe the opt-in flow and your STOP and HELP responses.
- Wait for review. Campaigns are reviewed for accuracy and policy compliance. Review times vary by provider and by period. Do not plan a launch around a best-case estimate.
- Link your numbers to the approved campaign. Your provider associates each texting number with the campaign. Sending should start only after that link is confirmed.
- Keep it current. If your business name, website or texting purpose changes, update the registration. A campaign that says "appointment reminders" does not cover a new promotional program.
When you set up two-way business texting with Talos Connect, we help you prepare and submit the registration. The decision rests with the registry and the carriers, so nobody can honestly promise an approval or a date.
What information will you be asked for?
Expect two groups of questions.
Brand details
- Legal business name, exactly as it appears on IRS records
- EIN, the nine-digit federal tax identifier
- Business type, such as LLC, corporation, partnership or nonprofit
- Registered business address
- Website address
- Industry or vertical
- A contact name, email address and phone number
Campaign details
- Use case, such as customer care, account notifications, marketing or a mixed category
- A plain description of what you send and to whom
- Two or more sample messages that look like what you will really send
- How recipients opt in, in enough detail that a reviewer can picture it
- The wording of your opt-in confirmation, STOP reply and HELP reply
- Whether messages include links, phone numbers or age-restricted content
The most common stumbling block is the legal name and EIN. A business that trades as "Bayou City Dental" may be registered with the IRS as "Bayou City Dental Associates, PLLC". The registration needs the second form. If you are unsure, find the IRS letter that assigned your EIN and copy the name from it character for character.
If you operate without an EIN, ask your provider about the sole proprietor path. It has existed within the framework for individuals and very small businesses, usually with lower limits, but support for it varies.
What does compliant opt-in and opt-out language look like?
Consent is the foundation of 10DLC compliance, and reviewers check it closely. The principles below reflect widely used industry practice. They are not legal advice, and marketing texts in particular carry stricter consent expectations under the TCPA, so have an attorney review a promotional program.
Opt-in. The customer should knowingly agree to receive texts from your business. A good opt-in disclosure, placed near the phone number field or signature line, tells people:
- Who is texting them, by business name
- What kind of messages to expect, such as appointment reminders and service updates
- That message frequency varies, or how often you will text
- That message and data rates may apply
- That they can reply STOP to cancel and HELP for help
- Where to find your privacy policy and terms
An example of disclosure wording:
By providing your mobile number, you agree to receive appointment reminders and service messages from Example Family Dental. Message frequency varies. Message and data rates may apply. Reply STOP to opt out or HELP for help. See our privacy policy at our website.
Consent to receive texts should not be buried as a condition of buying something, and consent given to one business does not transfer to another. Your privacy policy should also state that you do not share mobile opt-in information with third parties for their marketing. Reviewers look for that sentence.
Confirmation message. After someone opts in, send a confirmation that repeats the essentials: your business name, what they signed up for, frequency, rates, STOP and HELP.
STOP. When a recipient replies STOP, you must stop texting that number and send one final confirmation that they are unsubscribed. Good platforms enforce this automatically and also recognize common variants such as UNSUBSCRIBE, CANCEL, END and QUIT. Staff should not be able to override an opt-out by accident.
HELP. A reply of HELP should return your business name and a way to reach you, such as a phone number or email address, along with a reminder of how to opt out.
If you work in healthcare, texting raises privacy questions beyond 10DLC. Our guide to HIPAA compliant texting covers what belongs in a text message and what does not.
What are the most common 10DLC rejection reasons?
Most rejections are fixable paperwork problems, not judgments about your business. These are the patterns that come up again and again.
| Rejection reason | What the reviewer saw | How to fix it |
|---|---|---|
| Brand details do not match | Legal name or EIN differs from official records | Copy the name and EIN from your IRS letter exactly |
| Website problem | Site is down, under construction, a social profile only, or shows a different business name | Publish a working site that names the business as registered |
| Missing or thin privacy policy | No policy, or no mention of text messaging and data sharing | Add an SMS section, including that opt-in data is not shared for third-party marketing |
| Unclear opt-in | "Customers give us their number" with no disclosure | Describe the exact form or script and the disclosure wording |
| Sample messages do not fit | Use case says reminders, samples read like promotions | Make samples match the declared use case, with your business name in them |
| No opt-out language | Samples lack STOP instructions | Add "Reply STOP to opt out" to at least the initial and recurring messages |
| Public link shorteners | Samples include generic shortened URLs | Use your own domain or a branded short domain |
| Restricted content | Content falls into categories carriers restrict or prohibit | Ask your provider what is allowed before you apply |
On the last row: carriers restrict or prohibit certain content categories on 10DLC, commonly including material related to sex, hate, alcohol, firearms and tobacco, and they treat cannabis, high-risk financial offers and third-party lead generation with particular suspicion. Some categories are allowed with age gating and others are not allowed at all. If your business touches any of them, raise it with your provider first.
When a campaign is rejected, read the stated reason, fix that specific item and resubmit. Changing everything at once makes it harder to learn what the reviewer objected to. Be aware that some providers charge for resubmissions.
How much texting will you do? A hypothetical worked example
Registration forms and provider plans often ask for expected volume, and owners tend to guess low. The figures below are invented for illustration. Substitute your own.
Suppose a veterinary clinic has 1,800 active clients and books 650 appointments a month.
- Reminders. Each appointment gets a confirmation request and a day-before reminder: 650 x 2 = 1,300 messages.
- Client replies and staff responses. Suppose 40 percent of appointments produce a short exchange of 2 outbound texts: 650 x 0.40 = 260 conversations, and 260 x 2 = 520 messages.
- Missed-call text backs. Suppose 9 missed calls a day over 26 open days: 9 x 26 = 234 messages.
- Review requests. Suppose you ask after half of visits: 650 x 0.50 = 325 messages.
- Vaccine recall notices. Suppose 300 a month.
Total outbound messages: 1,300 + 520 + 234 + 325 + 300 = 2,679 a month.
Now account for segments. A standard text holds 160 characters. Longer texts are split into segments of 153 characters each and billed per segment. Suppose the reminders and recall notices, 1,600 messages in total, run about 230 characters with the clinic name, date, time and opt-out line. Each is 2 segments, because 230 is more than 160 and no more than 2 x 153 = 306. That adds 1,600 extra segments, for a total of 2,679 + 1,600 = 4,279 segments a month.
Two lessons come out of this made-up example. First, a modest clinic can send several thousand message segments a month, so choose a plan that fits real volume. Second, trimming a reminder below 160 characters halves its segment count. Special characters and emoji can also force an encoding with a lower per-segment limit, so keep texts plain. If reminders are your main use, our post on how appointment reminder texts reduce no-shows covers timing and wording.
Is toll-free verification a better alternative to 10DLC?
Toll-free numbers, those starting with 800, 888, 877 and similar prefixes, can also send business texts. They do not go through The Campaign Registry. Instead, they go through a separate toll-free verification process, in which you submit your business details, use case, sample messages and opt-in flow for review. Unverified toll-free traffic is restricted or blocked in much the same way unregistered 10DLC traffic is.
| Consideration | 10DLC local number | Toll-free number | Short code |
|---|---|---|---|
| Looks like | A local number customers recognize | A national 8xx number | A 5- or 6-digit number |
| Approval process | Brand and campaign registration | Toll-free verification | Carrier-by-carrier short code approval |
| Good for | Local businesses, two-way conversations | Businesses without a local identity, or multi-region brands | Very high-volume programs |
| Voice calls on same number | Yes | Yes | No |
| Relative cost and effort | Moderate | Moderate | Highest |
For most local businesses, a 10DLC number is the natural choice, because customers recognize the area code and can call the same number they text. Toll-free can make sense if you already publish a toll-free number or serve customers across many regions. The information you prepare is nearly the same for both, so the work in this guide is not wasted either way. Costs and review times for each path vary by provider and change over time.
Your 10DLC compliance checklist
Use this before you submit, and again once a year.
- Legal business name and EIN copied exactly from IRS records
- Website live, showing the same business name, address and phone number
- Privacy policy published, with a text messaging section
- Privacy policy states that mobile opt-in data is not shared with third parties for marketing
- Terms or an SMS terms page covering message types, frequency, rates, STOP and HELP
- Opt-in disclosure added to every form, paper or digital, where you collect mobile numbers
- Opt-in method documented with a screenshot or the script staff use
- Sample messages written, each with your business name and matching the declared use case
- Opt-in confirmation, STOP reply and HELP reply drafted
- Links in messages point to your own domain, not a public shortener
- Every texting number linked to an approved campaign
- A named person responsible for updating the registration when the business changes
- Consent records kept: who opted in, when and how
What are the common mistakes businesses make with 10DLC?
- Texting first and registering later. Messages fail quietly, and staff conclude that customers are ignoring them.
- Using the trade name instead of the legal name. This is the single most avoidable rejection.
- Registering one use case and sending another. A campaign approved for reminders does not cover a holiday promotion. Add or change the campaign first.
- Treating registration as consent. Registration identifies you to carriers. It does not give you permission to text anyone who has not agreed.
- Importing an old contact list and blasting it. People who never opted in to texts will report the messages as spam, and carrier complaints can get a registered campaign suspended.
- Vague sample messages. "Hi, this is a reminder" tells the reviewer nothing. Include the business name, the purpose and the opt-out line.
- Ignoring opt-outs across systems. If a customer replies STOP in one tool and you text them from another, you have a problem. Keep texting in one system.
- Forgetting the FCC side. Consent and calling-time rules under the TCPA apply regardless of registration status. The FCC publishes consumer and industry guidance, and an attorney can advise on your specific program.
Next step
If you would like help getting registered, or you want texting, phones and reminders in one place, talk to us. We will look over your website, opt-in forms and sample messages before anything is submitted, so the common rejection reasons are dealt with first. Contact Talos Connect to get started, or browse the full feature list first.
Frequently asked questions
What is 10DLC registration?
10DLC registration is the process of registering your business, called a brand, and your texting use case, called a campaign, so US mobile carriers will accept messages sent from a 10-digit long code through software. Your messaging provider collects the details and submits them to The Campaign Registry, the central registry the carriers rely on.
Do I need 10DLC registration if I only text my own customers?
Generally yes, if the texts are sent through software from a standard 10-digit number to US mobile phones. The carriers treat that as application-to-person traffic regardless of how well you know the recipients. Appointment reminders, invoices and two-way customer service chats through a texting platform all count. Confirm the specifics with your messaging provider.
How long does 10DLC registration take?
It varies by provider, by use case and over time, so treat any fixed number with caution. Brand verification is often quicker than campaign review, because campaigns are checked by people against content and opt-in rules. Plan for a waiting period, submit complete and consistent information the first time, and ask your provider for current expectations.
How much does 10DLC registration cost?
There are typically registration charges for the brand and recurring charges for each campaign, and carriers may add per-message surcharges. The amounts are set by the registry, the carriers and your provider, and they have changed more than once. Ask your messaging provider for a current written fee schedule rather than relying on figures in an article.
What happens if I send texts without registering?
Unregistered application-to-person traffic on 10-digit numbers is subject to filtering and blocking by US carriers, and providers may add surcharges or suspend sending. In practice that means reminders and replies silently fail to arrive. Many messaging providers now refuse to enable US texting on a number until registration is approved.
Can a sole proprietor without an EIN register for 10DLC?
The framework has included a sole proprietor path for individuals and very small businesses without an Employer Identification Number, usually with lower volume limits and extra identity verification. Availability and rules differ between messaging providers and have changed over time, so ask your provider whether it supports this path and what limits apply.
Is 10DLC registration the same as TCPA compliance?
No. 10DLC is a carrier and industry framework that controls whether your messages are delivered. The Telephone Consumer Protection Act is a US federal law about consent for certain calls and texts, enforced through the FCC and private lawsuits. You need to satisfy both. This is general information, not legal advice, so consult an attorney about your situation.
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