# Alphanumeric sender ID

Request an alphanumeric sender ID to send one-way SMS messages from a personalized sender name (such as your business or brand name) instead of a phone number. This is commonly used for notifications and alerts,where recipients see your brand name as the sender ID and can easily identify the source of the message.

## Regional availability

Sender IDs are not available in the United States or in Canada. To find out if they are offered in your country, see [International support for Alphanumeric Sender ID](https://help.twilio.com/articles/223133767-International-support-for-Alphanumeric-Sender-ID).

## Requirements

Alphanumeric sender IDs must meet the following requirements:

* Send messages only to [supported countries](https://help.twilio.com/articles/223133767).
* Register the sender ID when required.
* Limit the sender ID to 11 characters.
* Use uppercase and lowercase ASCII letters, digits (0–9), and spaces.
* Include at least one alphabetic character; the sender ID can't consist of numbers only.

## Add to a Messaging Service

Add an alphanumeric sender ID to a Messaging Service. For SMS messages sent to a supported country, the Messaging Service sets your alphanumeric sender ID as the `From` parameter. If the destination country doesn't support alphanumeric sender IDs, Twilio uses a phone number from the Messaging Service instead.

## Create a registration

To create a registration for an alphanumeric sender ID:

1. Navigate to **Products & Services** > **Trust Hub** > [**Registrations**](https://1console.twilio.com/us1/develop/trusthub/registrations/a2p-brands/brands).
2. Select the **Alphanumeric Sender IDs** tab on the Registrations page.
3. Click **Create registration**.
4. Provide these details to set up your alphanumeric sender ID:
   * Where are the customers you want to communicate with?
   * Where is your global HQ located?
   * What kind of messages do you want to send with this alphanumeric sender ID?
   * What is your requested sender ID?
   * Will this number be registered to an individual or a business?
   * Are you a Direct or Independent Software Vendor (ISV), reseller, partner?
   * Will you subassign this alphanumeric sender ID to your end customers?