This article reflects our current support capabilities for custom SMS sender IDs, or alphanumeric sender ID worldwide. Click the country's name for guidelines on sending Twilio Programmable SMS messages to this locale (where available).

Notice: Countries that require you to register the desired alphanumeric sender ID prior to sending messages from this ID are marked Pre-Registration Required. To qualify for pre-registration, all SMS sent to that country from your account must be transactional.* Some examples of transactional SMS include auth codes, one-time passwords (OTP), and account alerts.

To start the pre-registration process, contact Twilio Support and let us know the country where you wish to set up pre-registration.

* Saudi Arabia offers pre-registration options for either transactional or promotional messages.
** For messages to China, pre-registration of message body template is recommended.
† There's a monthly fee of $6.00 USD for Czech Republic ID pre-registration.