# SMS registration for US numbers (A2P 10DLC)

> Register an A2P 10DLC campaign so your US numbers can send SMS, what the registration needs, and how long it takes.

- URL: https://kb.voipcloud.online/us/services/phone-numbers/us-sms-a2p-registration/
- Section: Services › Phone numbers
- Type: guide
- Applies to: United States
- Last reviewed: 2026-11-10

US numbers can receive SMS straight away. To **send** SMS from a US number, US regulations require your business and your messaging to be registered first. This is called **A2P 10DLC** (application-to-person messaging over standard 10-digit numbers). Until it's done, the number shows **SMS: Incoming messages only**, with the link **A2P is required to send SMS**.

## How it works

- You register an **A2P campaign**: a description of who you are and what kind of messages you send.
- One campaign covers **up to 49** of your US numbers.
- Registration with the US messaging bodies can take **up to six weeks**.
- A monthly campaign fee and an activation fee apply, plus an SMS plan for US A2P messaging. Ask the support team for the current prices.

## What you need

- Your business's legal details, and whether it's a private company, a publicly traded company, or a charity or non-profit organisation.
- Your industry (vertical), and the kind of messages you send, such as account notifications, customer care, delivery notifications, two-factor authentication codes or marketing.
- How people agree to receive your messages (opt-in). Your opt-in message must:
  - name your business;
  - say how often you'll send messages;
  - say "Message and data rates may apply";
  - tell people they can reply **STOP** to opt out and **HELP** for help.

Your messages, opt-out replies and help replies must also name your business. Follow the CTIA Messaging Principles for business messaging.

## Register

1. Ask the support team for the **A2P 10DLC Registration Form**: [raise a support ticket](https://kb.voipcloud.online/us/support/support-tickets/).
2. Fill it in and send it back to the support team, with the US numbers you want to use.
3. The support team submits the registration and tells you when it's approved.

Once the campaign is approved, route the numbers for SMS: see [SMS to Webphone users](https://kb.voipcloud.online/us/services/phone-numbers/sms-to-webphone-users/) and [SMS to email](https://kb.voipcloud.online/us/services/phone-numbers/sms-to-email/).

## Related

- [US number types](https://kb.voipcloud.online/us/services/phone-numbers/us-number-types/)
- [Send and receive SMS in the Webphone](https://kb.voipcloud.online/us/phones-and-apps/webphone/webphone-sms/)
- [SMS not received](https://kb.voipcloud.online/us/troubleshooting/sms-not-received/)