We use generic Alphanumeric Senders (AUTHMSG, TWVerify, and VerifyTWL) by default for Verify and Authy API messages in 79 countries around the world. When One-time Password (OTP) messages are sent via Verify or Authy in one of these supported countries, and a specific sender hasn't been configured, we automatically use these sender IDs, without any changes required on your end.

What is an Alphanumeric Sender ID?

In some countries, the Sender ID displayed to a message recipient can display a custom alphanumeric phrase like the company’s name or service instead of a long-code (phone number) or short-code.

Why do I need to register my Alphanumeric Sender ID for my Verify OTP messages?

While Twilio Verify uses generic senders on behalf of our customers, there are some countries where we recommend you register your own Sender ID to guarantee the conversion rate of your messages. This is because each country has its own unique set of requirements.

Notice: it is best to work with your Account Executive for your unique use case.

How do I register my Alphanumeric Sender ID?

To start the pre-registration process: Fill out this form for each country you wish to register in. Be sure to ✓ the box at the end of the form indicating that you will be using the Alphanumeric Sender ID in Authy or Verify products.

Learn more about which countries require pre-registration of Sender IDs here.