SMS short codes are specific to Everbridge. Short codes are country-specific, cannot be customized for individual organizations, and cannot be changed.

For countries other than the United States, SMS Sender IDs can be changed by country in Settings > Organization > Notifications > Sender Information (see screenshot to the right). You can add up to 20 custom Sender IDs per country.

To verify whether your organization is sending SMS from a custom Sender ID or from an Everbridge shared/global Sender ID, check the SMS Sender ID configuration for the relevant organization in Settings > Organization > Notifications > Sender Information:

• If an alphanumeric custom Sender ID is configured for that organization, that custom ID may require registration with the appropriate national regulator before it is used for recipients in that country.

• If no custom Sender ID is set and the account uses Everbridge shared/global SMS codes, those codes are already registered and typically require no additional action.

Sender SMS numbers can vary between different organizations. Each organization might have its own default routing number or sender ID. To maintain consistency, you should check the Sender Information settings in Settings > Organization > Notifications and remove any custom sender IDs that might be causing number variations.

NOTE: Custom Sender SMS IDs are only available for standard notifications without confirmation. Updating SMS IDs may impact Sender SMS ID settings for existing notification templates.

Custom Sender IDs are for display purposes only; Everbridge actually uses short and long codes to deliver SMS messages, a list of which can be found in knowledge article EBS: Everbridge Global SMS Codes.

Informing contacts of the short codes that deliver SMS notifications and encouraging them to add the short code to their device's contact list will increase response rates.