# 30034: US A2P 10DLC - Message from an Unregistered Number

Log Type: APPLICATION

Log Level: ERROR

## Description

Messages sent to US numbers will not be delivered if they are sent from numbers that are not associated with an approved A2P 10DLC Campaign. This [guide](https://support.twilio.com/hc/en-us/articles/4418081745179-How-do-I-check-that-I-have-completed-US-A2P-10DLC-registration-) will help you determine if you have completed registration for A2P 10DLC. To initiate or continue an A2P 10DLC registration, [visit your console here](https://console.twilio.com/us1/develop/sms/regulatory-compliance/a2p-onboarding). Find out how to register using [this guide](https://support.twilio.com/hc/en-us/articles/1260801864489-How-do-I-register-to-use-A2P-10DLC-messaging-).

For a step-by-step walkthrough, check out [this video on resolving Error 30034](https://twil.io/resolve30034).

### Possible causes

You are sending messages to the US using a US 10DLC number that is not associated with an approved A2P 10DLC Campaign.

### Possible solutions

Associate your US 10DLC number with a registered A2P Campaign by adding it to the corresponding Messaging Service via the Twilio Console or API. Find out how to register using [this guide](https://support.twilio.com/hc/en-us/articles/1260801864489-How-do-I-register-to-use-A2P-10DLC-messaging-).

Alternatively, you can also use a different number that is already associated with an approved A2P Campaign to send messages in the US.