Alphanumeric Sender ID allows you to set your company name or brand as the Sender ID when sending one-way SMS messages to supported countries. Alphanumeric Sender IDs may be up to 11 characters. Accepted characters include both upper- and lower-case ASCII letters, the digits 0 through 9, and space: A-Z, a-z, 0-9. They may not be only numbers.
Not all countries support this feature. You can see a list of countries that support Alphanumeric Sender ID along with pre-registration requirements for each country.
You can add Alphanumeric Sender IDs to a Messaging Service. When you send SMS to a supported country, Twilio Copilot will use your Alpha Sender ID as the
From parameter to deliver your message. When you send SMS to a country where alphanumeric sender IDs are not supported, Twilio will use a phone number from your messaging service.
In order to use Alpha Sender with your Messaging Service, Alphanumeric Sender ID must be enabled on your Account's SMS Settings.
To learn more see Getting Started with Alphanumeric Sender ID