A2P 10DLC setup guide

How A2P 10DLC registration works and how to track your brand and campaign registration in Landing Zone's Trust Center.

Updated 4 min readMaintained by Landing Zone

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A2P 10DLC is how application-to-person text messaging is registered on standard 10-digit US phone numbers, so mobile carriers can identify the business behind the messages. You complete registration with the carrier registry through your Twilio account, then track it in Landing Zone under Settings → Trust Center.

What A2P 10DLC is

"A2P" stands for application-to-person — messages your software sends to people, as opposed to one person texting another. "10DLC" means a standard 10-digit long code (an ordinary local phone number).

In the United States, business messaging over 10-digit numbers is registered so mobile carriers can recognize who is sending and why. Registration generally has two parts:

  • Your business (brand): who you are, verified from your legal business details.
  • Your use case (campaign): how and why you message people, with sample messages and how contacts opt in.

Carriers use this information to deliver wanted messages and filter unwanted ones. The exact requirements are set by mobile carriers and the messaging ecosystem — see the Twilio documentation in Sources.

What Landing Zone does

Trust Center (open Settings → Trust Center) is a registration status tracker. After you register your brand and campaign with the carrier registry through Twilio, you enter your Brand ID and Campaign ID in Trust Center. Landing Zone then tracks your progress through the three registration steps.

SMS sending is gated on registration: batch and campaign SMS unlock once Trust Center shows your registration as approved. This gate protects your deliverability — carriers may filter unregistered application-to-person traffic on 10-digit numbers.

What Landing Zone does not do

Landing Zone does not submit your registration for you. There is no in-app brand or campaign submission — you register with the carrier registry through your Twilio account, then bring the resulting IDs into Trust Center.

Landing Zone also does not remove the underlying costs: Twilio and carrier registration and messaging fees may apply, and they are separate from your Landing Zone subscription. An active Landing Zone account is required to use Trust Center and to send.

Registration itself does not make any particular message lawful. It identifies your traffic to carriers; you remain responsible for consent, audience, content, and timing.

What you need before you start

Before you begin

How setup works

  1. Register your brand with the carrier registry through Twilio. Enter your legal business details exactly as they appear on official records. Accurate details help registration go smoothly.
  2. Register your campaign. Describe how and why you message contacts, add sample messages, and explain how people opt in and opt out.
  3. Wait for review. Brand and campaign registrations are reviewed by the registry and carriers. Review times vary with how complete and consistent your information is.
  4. Note your Brand ID and Campaign ID. These identifiers are issued through your Twilio account as your registration is processed.
  5. Enter the IDs in Landing Zone. Open Settings → Trust Center and enter your Brand ID and Campaign ID.
  6. Track the three-step progress in Trust Center. Landing Zone shows where your registration stands.
  7. Send once approved. When Trust Center shows approved status, batch and campaign SMS sending unlocks for your registered use case.

Consent, opt-out, and message content

Registration is only part of responsible messaging. Carriers generally expect that you have permission to message a contact, that your sender is recognizable, that people can opt out at any time, and that what you send matches your registered use case. SMS generally carries stricter consent, carrier, and registration considerations than ordinary commercial email.

Common reasons registration is delayed

  • Business details that do not match official records.
  • A vague use case description or missing sample messages.
  • No clear explanation of how contacts opt in.

Providing accurate, complete information up front is the best way to keep review moving.

Frequently asked questions

Do I need my own Twilio account?

Yes — brand and campaign registration happens with the carrier registry through Twilio. Landing Zone's Trust Center tracks your registration status once you enter your Brand ID and Campaign ID.

Where do I find my Brand ID and Campaign ID?

They are issued through your Twilio account as your brand and campaign registrations are processed. Copy them into Settings → Trust Center in Landing Zone.

How long does registration take?

Review times vary by carrier and depend on how complete and accurate your registration is. Complete, consistent information generally reviews faster.

Sources

Sources