Alphanumeric Sender ID allows you to send Releans SMS messages from a personalized sender name (rather than using your Releans shared phone number) in supported countries. Instead of using an E.164 formatted Releans Shared Phone number for the "From" value, you can use a custom text string like your company's name.

Alphanumeric Sender ID works on single text messages, as well as with SMS Campaigns.

Releans Requirements

Alphanumeric Sender ID is automatically supported on all Releans accounts.

Send SMS Messages using an Alphanumeric Sender ID

To send SMS messages using an Alphanumeric Sender ID, use the desired ID for the From dropdown list in your after registering new one via New Sender Name.

Sending Limitations

This feature is only available for sending messages to supported countries. Some supported countries may have additional requirements, including pre-registration for alpha sender IDs, or limiting these messages to be only sent as transactional messages.

For the full list of supported countries, and pre-registration requirements, please see our article on International Support for Alphanumeric Sender ID. Please note that this feature is currently unsupported in the North American mainland countries of Canada, the US, and Mexico.

Additionally, messages sent out using an Alphanumeric Sender ID cannot be replied to directly.

What characters can I use in my Alphanumeric Sender ID?

Alphanumeric Sender ID supports up to 11 characters from the following categories:

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

Your ID must include at least three letters; It cannot be comprised of only numbers. Non-ASCII special characters and punctuation are not allowed.

How much does Alphanumeric Sender ID cost?

For sending messages from Releans, there is no price difference for using an Alphanumeric Sender ID vs. a shared Releans phone number.

Can users respond to my messages that use Alphanumeric Sender ID?

No. Alphanumeric Sender ID is only used for one way communication. Recipients of messages with an Alphanumeric Sender ID will not be able to respond to you directly. Because of this limitation, we recommend only using Alphanumeric Sender IDs for one-way outbound messages. You may also include a contact number, email, or website address in your outgoing messages if you wish to receive responses.

How do users opt out of messages sent with an Alphanumeric Sender ID

Since Alphanumeric Sender ID can only be used for one way messaging, inbound messages sent to your Alphanumeric Sender ID will not be received on your Releans account.

Customers receiving text messages with your Alphanumeric Sender ID should have opted into your service and been informed on how to opt out. We recommend that you provide your users with a clear description in your terms in services about how many messages they should expect to receive and how they can opt out. Spoofing of brands or companies with Alphanumeric Sender ID is not allowed.

We also highly recommend offering your users the ability to opt out of receiving SMS messages from your service by:

• Writing to your support team
• Calling your support phone line
• Texting another phone number or shortcode