---
title: "A2P 10DLC registration guide"
description: "Register your business for US texting from Settings → Phone & Voicemail, then keep carriers happy with consent and opt-outs."
url: https://help.k3x.ai/en/articles/97-a2p-10dlc-registration-guide
collection: "Email, Calls and SMS"
updated: 2026-10-04
language: en
---

# A2P 10DLC registration guide

Register your business for US texting from Settings → Phone & Voicemail, then keep carriers happy with consent and opt-outs.

A2P 10DLC is the US carrier registration that lets a business text from local numbers. Submit it from **Settings → Phone & Voicemail**, where the status banner tracks your progress. Approval takes days to a couple of weeks. Once approved, carriers keep watching your traffic, so the practices below matter as much as the form.

## Submit your registration

1.  Open **Settings → Phone & Voicemail**. The banner at the top shows your registration status.
    
2.  Start the registration and enter your business identity: legal name, EIN, address, website.
    
3.  Describe your use case, how people opt in, and give two or three sample messages.
    
4.  Submit. K3X files the registration with the carriers and updates the banner as it moves. Carrier registration fees are passed through at cost, and the exact amount is shown before you confirm.
    

Registration belongs to your business, not to one number. Any local number you add later joins the same campaign.

## Website requirements

Carrier reviewers visit your site. It should have a business description, contact information, a Privacy Policy, Terms, and your legal entity name. Rejections come from incomplete sites, missing policies or a company that cannot be verified.

-   **Privacy Policy** must say that customer data is not sold or shared, apart from service providers, legal obligations, mergers and user-authorized sharing.
    
-   **Terms** need an SMS section: message types, frequency, opt-out and HELP instructions, and "Message and data rates may apply."
    

## Approved opt-in methods

-   **Website forms.** Consent language above the submit button, links to Terms and Privacy, an optional (never mandatory) SMS checkbox. Example: "By submitting this form you agree to receive automated SMS from Acme. Message frequency may vary. Msg and data rates may apply. Reply STOP to unsubscribe or HELP for help."
    
-   **Booking forms.** Calendly-style tools work if you add the full disclosure, policy links and an explicit checkbox inside the booking flow.
    
-   **Verbal consent.** Use a standard script, document it, and ask the person to send the first text (START, YES) so there is an inbound record.
    
-   **Text-in.** "Text START to receive updates from Acme" on a public call-to-action.
    

If carriers audit you, they may ask for proof of consent for specific numbers.

## Write compliant messages

-   **Identify yourself in the first message.** "Hi Brian, this is Carol from Acme about your demo request today." Replies inside an active conversation do not need the introduction again.
    
-   **Include opt-out language in the first message** and at least once every 30 days after: "Reply STOP to unsubscribe."
    
-   **Reconfirm consent** about every six months. Numbers change hands.
    
-   **Avoid generic link shorteners** such as bit.ly or tinyurl. Use your own domain or the full URL.
    

Bad: "Hey, checking in." Good: "Hey John, this is Mike from Acme checking in on your application. Reply STOP to opt out."

## What K3X handles for you

STOP, STOPALL, UNSUBSCRIBE, CANCEL, END and QUIT opt the sender out automatically, and future texts to them fail. START, YES or UNSTOP opt them back in. HELP gets an automatic reply. See STOP, HELP and quiet hours.

## Restricted industries

Debt relief, lending, cryptocurrency, gambling, adult services and get-rich-quick offers face stricter review or rejection. If your business is legitimately in one of these, add context: your actual business model, licensing, and your exact SMS use cases.

## Why this matters after approval

Carriers filter at the account level. A handful of bad messages can get random messages across your whole account dropped, and repeated violations can suspend texting entirely. Treat compliance as an ongoing process: proper consent, clear sender identity, sensible frequency, consistent opt-out handling and high engagement.

## Related

-   Toll-free verification: the 10DLC alternative
    
-   Send your first SMS
    
-   STOP, HELP and quiet hours
    
-   Buy or port a phone number