Alphanumeric Sender IDs

With Alphanumeric Sender IDs, you can send Cloud SMS messages to supported countries from a personalized Sender ID (for example; the name of a business or organization) instead of an E.164-formatted phone number.

Sending to Australian numbers? Registration is required from 1 July 2026

If you send branded SMS to Australian numbers, you must register your Sender ID with ACMA's SMS Sender ID Register. From 1 July 2026, unregistered Sender IDs may be replaced with "Unverified" on recipients' phones. See Australian register for the full process.

Country Support?

You can find out which countries support Sender IDs here.

Formatting Rules

Alphanumeric Sender IDs can contain up to 11 characters and can use the following:

• Upper-case letters A - Z
• Lower-case letters a - z
• Numbers 0 - 9
• Spaces

Sender IDs must contain at least one letter. Special characters and punctuation are not allowed.