Authsignal has launched Number Verify with Aduna, with the service available across major mobile carriers in the US and in Australia through Telstra.
The feature lets businesses confirm that a customer possesses a mobile number without requiring them to receive or enter an SMS one-time passcode. Depending on the network and implementation, the check can be delivered through network-based verification, also known as silent network authentication, or through SIM card-based verification.
The launch comes as businesses reassess the role of SMS in authentication. Guidance in NIST SP 800-63B-4 classifies authentication using the public switched telephone network, including SMS-based authentication, as a restricted authenticator. That means organisations using it must offer an unrestricted alternative and prepare for the possibility that restricted methods may become unacceptable.
Number Verify is designed to remove the code from the authentication step altogether rather than provide another way to deliver one. In high-volume digital journeys, this can reduce reliance on SMS delivery, retries, and support for failed codes.
Paul Bickley, Vice President of Revenue at Authsignal, linked the launch to changing regulatory expectations and the wider mix of authentication methods available to companies.
"Regulators are already moving past SMS and businesses relying on it are inheriting a risk that only grows with scale. Number Verify removes the one-time passcode from the journey entirely. Combined with passkeys and adaptive authentication inside Authsignal, businesses can match the verification method to the risk," Bickley said.
Carrier access
Aduna provides access to network data through a single platform that brings together signals from telecom operators. Its Number Verification offering spans three US carriers, providing a single route into the major mobile networks in that market.
Through the partnership, Authsignal offers one integration point for companies that want to use number verification in their customer journeys. This removes the need to build separate integrations with each carrier before adding the service to authentication flows.
The service can sit alongside Authsignal's existing risk logic, orchestration, and fallback paths, allowing businesses to choose among different methods based on the user, the journey, and the level of risk.
Anthony Bartolo, Chief Executive Officer at Aduna, said the partnership extends the reach of carrier-backed number verification in two markets.
"Digital trust depends on making secure experiences simple. Through our partnership with Authsignal, businesses can now access trusted, carrier-backed Number Verification across the major mobile networks in both the United States and Australia. Together, we're helping organisations strengthen security, reduce fraud and deliver more seamless digital experiences at scale," Bartolo said.
Wider footprint
The agreement also expands Authsignal's number verification coverage internationally, adding Australia through Telstra as Aduna broadens its network API ecosystem. For Authsignal, the launch adds another option to its authentication platform rather than establishing a single default replacement for SMS.
Authsignal works with customers in 17 countries across sectors including airlines, financial services, marketplaces, government, and telecommunications. It processes more than 12 million authentication events each month.
Aduna is backed by telecom groups including AT&T, Deutsche Telekom, Orange, Reliance Jio, Singtel, Telefónica, Telstra, T-Mobile, Verizon, and Vodafone, alongside Ericsson. Its model combines network APIs from multiple operators under a single platform built on the CAMARA open-source project run through the GSMA and the Linux Foundation.
Authsignal aims to give businesses more building blocks for authentication and let them apply the method that fits the customer, the journey, and the level of risk.