Only certain countries allow the use of a Custom Sender ID.

Using our service you can send messages using an alphanumeric sender ID to an international number when the alphanumeric sender ID is supported by carriers in the destination country.

This article reflects currently support capabilities for alphanumeric SMS sender IDs worldwide.

Which Countries Support Alphanumeric Sender IDs?

You can find out which countries support alphanumeric sender IDs here: Global Delivery List.

*Please be aware that from the 1 July 2026 alphanumeric sender IDs in Australia will need to be registered:
https://help.kudosity.com/s/article/000003293-important-information-australia-alphanumeric-sender-ID-changes

What happens to messages where alphanumeric sender IDs aren't supported?

For countries where alphanumeric sender IDs are not supported the platform replaces the alphanumeric sender ID with a generic local number for the destination region in order to ensure your messages are delivered correctly.

What are Special Conditions?

Important ACMA update: To better protect consumers the ACMA will introduce a new Alphanumeric Sender ID register for businesses sending to Australia. From 1 July 2026 unregistered traffic will be over-stamped with "Unverified" or may be blocked entirely. Read more >

Some countries may require registration of the desired alphanumeric sender ID prior to sending messages. You can find country-specific details in the Special Conditions column of the Global Delivery List.

You can start the pre-registration process by contacting our support team.

How to Define a Custom Sender ID?

You can define new custom sender IDs when sending messages through the platform.

How to define a Custom Sender ID

Please note that some only some countries allow you to set a personal mobile number as your alphanumeric sender ID - most countries will only allow a word or business name to be used.

If you have any questions about custom sender IDs please contact our Customer Success or Support teams.