What you should know about Australia's new SMS Sender ID Register

Australia's new SMS Sender ID Register, effective from July 1, 2026, requires telecommunications providers to get approval from the Australian Communications and Media Authority (ACMA) for any alphanumeric Sender IDs used in messages sent within the country. This regulatory change aims to distinguish legitimate Sender ID traffic from potential fraud and mandates an "Unverified" label for unapproved IDs. Entities eligible for registration include individuals, corporations, government entities, and others, and they must ensure their Sender IDs comply with specific format requirements. Twilio, as a registered service provider, is enhancing its onboarding process to assist customers in navigating these changes, emphasizing the importance of maintaining up-to-date business information and verifying legitimate use cases for Sender IDs. Although details are still being finalized, Twilio is committed to providing guidance and support for customers to ensure a seamless transition to the new framework, allowing continued message flow while preparing for compliance with the new regulations.