A2P 10DLC Registration: What It Is and How to Register

A2P 10DLC registration is the carrier-required process that lets a US business send text messages from a regular 10-digit phone number without getting blocked. It has two parts: registering your brand, which is your business identity tied to your EIN, and registering each campaign, which is the use case and sample messages you plan to send. Since February 2025, the major carriers block unregistered business texts, so any company that texts customers, even just appointment reminders, has to complete it. Brand approval usually takes one to three business days; campaign review is running about 10 to 15 days in mid-2026.

Here is what the terms mean, who has to register, what it costs in 2026, and how to get through it without your messages disappearing.

What A2P 10DLC actually means

A2P stands for application-to-person: a message sent by software to a person, as opposed to one human texting another. 10DLC means 10-digit long code, which is just an ordinary local phone number, as opposed to a short code or a toll-free number. Put together, A2P 10DLC is the framework the wireless carriers built to allow automated business texting over normal phone numbers while filtering out spam and scams.

Before this system, businesses texted from long codes with no oversight, and carriers responded by silently blocking anything that looked automated. Registration is the deal the carriers offer instead: tell us who you are and what you intend to send, and we will deliver your messages. Skip it, and delivery quietly drops toward zero.

Who has to register

Almost every US business that sends any automated or bulk text from a standard number. That includes appointment reminders, order and delivery alerts, two-factor codes, review requests, and marketing texts. If a computer sends it, or a person sends the same message to many customers, it counts. The threshold is not marketing volume; a dentist texting reminders needs it as much as a retailer running promotions.

The main exception is direct, one-to-one conversational texting that a human types to a single person. Even there, carriers watch patterns, and the safe assumption for any business is that customer texting requires registration. You register once as a brand and then register each distinct type of messaging you do as a campaign.

Brand and campaign registration, explained

Brand registration verifies the company. You submit the legal business name, EIN, physical address, and a contact, and a registry checks that the identity is real. A verified EIN-based brand gets better throughput and trust than an unverified or sole-proprietor brand, which is one reason forming an LLC and using its EIN pays off for anyone serious about texting customers.

Campaign registration describes what you will send. You pick a use case such as customer care, marketing, or two-factor authentication, provide sample messages, and prove how customers opt in. The opt-in proof is where most rejections happen: carriers want to see that people agreed to receive texts, so a screenshot of your sign-up form or checkbox is not optional.

What A2P 10DLC registration costs in 2026

The fees are small individually but add up, and they come from the registry and the carriers, not usually from your phone provider. As of 2026, expect roughly:

• Brand registration: about $4 one-time for a sole proprietor, or $48 and up for a standard EIN-based brand that includes vetting.
• Campaign registration: around $15 one-time per campaign, plus a recurring monthly fee of roughly $1.50 to $10 per campaign depending on the use case.
• Per-message carrier surcharges: about $0.003 to $0.005 per SMS segment, passed through from AT&T, T-Mobile, and Verizon. T-Mobile raised its pass-through fees again in January 2026, so a business sending 10,000 messages a month now pays roughly $30 to $50 in carrier surcharges alone.

These figures move, and the carriers adjust them more than once a year, so treat them as a current estimate rather than a fixed price list. The one-time and monthly registry fees are predictable; the per-message surcharges are the line that scales with how much you actually text.

How long registration takes

Brand approval is usually quick, one to three business days, because it is mostly an identity check. Campaign approval is the slow part. Through mid-2026, review has stretched to about 10 to 15 days because of submission volume and stricter opt-in review. End to end, plan on one to four weeks before your first compliant text goes out, and start the process before you need it, not the week of a launch.

The fastest way to get stuck is a weak opt-in story or a mismatch between your sample messages and your stated use case. Clean, specific submissions clear faster.

How to register, step by step

1. Gather your business details. Legal name exactly as registered, EIN, physical address, and a contact. An EIN-based brand clears more traffic than a sole proprietor, so register the business, not yourself.
2. Register the brand. Submit the identity through your messaging provider, which files it with the registry. Approval typically lands in one to three business days.
3. Define each campaign. List the message types you send: reminders, alerts, marketing, verification codes. Each distinct type is its own campaign with its own sample messages.
4. Prove opt-in. Show exactly how customers agree to receive texts, with a screenshot of the form, checkbox, or keyword sign-up. This is the most common rejection point, so be specific.
5. Submit and wait for campaign approval. Expect about 10 to 15 days in 2026. Once approved, your texts deliver at full throughput instead of being filtered.

The easier path: a provider that handles it

You do not have to file directly with the registry yourself. A business text messaging service with business texting built in walks you through brand and campaign registration inside the dashboard and files it for you, so the compliance work is a form, not a research project. If you have not picked the number yet, how to get a business text number covers the four setup steps that come before this one. That also keeps your calling and texting on one registered number, which matters because an unregistered number is also the fastest way to get flagged as spam on outbound calls. If you are looking at this from the customer's side instead, whether you can text a business phone number explains why some messages to a company vanish without a bounce.

Registration is one of several messaging and privacy obligations a growing business now has to track, and teams in regulated industries increasingly manage it alongside their other duties in dedicated compliance management software rather than a spreadsheet. However you track it, the goal is the same: register before you send, keep your opt-in records, and your customer texts arrive instead of vanishing.

What happens if you do not register?

Your texts get filtered. Carriers do not bounce unregistered A2P traffic with a clear error; they throttle and silently drop it, so the messages look sent on your end but never reach the customer. That means missed appointment reminders, undelivered verification codes, and marketing that quietly goes nowhere, all while you keep paying to send. Since the major carriers began enforcing this in February 2025, registration is not a best practice, it is the price of texting customers at all.