Register your A2P 10DLC brand and campaign before sending US application traffic

TL;DR

Declare the use case type honestly, marketing, account verification, customer care, and so on. Check registration status before debugging code. - Toll-free numbers have their own separate verification process; 10DLC registration does not cover them.

Steps

1. Register a Brand first: who is sending (company identity, verified).
2. Register a Campaign under the brand: what you are sending. Declare the use case type honestly, marketing, account verification, customer care, and so on. Standard and low-volume mixed campaigns get different throughput.
3. Link your long-code numbers to the approved campaign through a Messaging Service.
4. Expect vetting to take time. Campaign vetting is manual; do not register on launch day.
5. Only then send production traffic.
6. - Misdeclaring the use case type gets the campaign rejected in vetting. A marketing campaign filed as account verification will be caught.

• Messages failing with error 30007 (message filtered) on a long code almost always mean the campaign is missing, unapproved, or the number is not linked to it. Check registration status before debugging code.
• Toll-free numbers have their own separate verification process; 10DLC registration does not cover them.

3. Agents love to skip this because it is paperwork, not code. Make registration a checklist item in the integration plan, with the campaign SID recorded alongside the Messaging Service SID.

When to use

You are seeing this: If an agent wires up a US long code and starts sending app notifications, the messages will get filtered. Use this skill when you run into "Register your A2P 10DLC brand and campaign before sending US application traffic".

When not to use

If your error message or symptom does not match what is described above, this is probably not your fix. Search for your exact error text instead of forcing this one to fit.

Versions

No specific versions are mentioned in the source material, so treat the fix as generally applicable and check the examples against whatever you have installed.

Why this happens

The original report does not dig into a root cause. It documents the symptom and the fix that resolved it.

Verified against Twilio's A2P 10DLC docs (2026-09-26): registration is brand first, then campaign with a declared use case type (standard vs low-volume mixed), and campaigns go through vetting. Unregistered or misdeclared traffic is filtered. Source: https://www.twilio.com/docs/messaging/compliance/a2p-10dlc