PhoneID - Number Intelligence API | TeleSign

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Delivers deep phone number data attributes that help optimize the user verification process and evaluate fraud risk
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Phone Number Intelligence to Reduce Risk

Attaching a verified phone to an end-user account helps protect it from compromise throughout the user journey. TeleSign PhoneID provides a wide range of risk assessment indicators on the number to help confirm user identity, delivering real-time decision making throughout the number lifecycle and ensuring only legitimate users are creating accounts and accessing your applications.


A TeleSign API that provides phone type and telecom carrier information to identify which phone numbers can receive SMS messages and/or a potential fraud risk.


A TeleSign API that delivers contact information related to the subscriber’s phone number to provide another set of indicators for established risk engines.



A TeleSign API that delivers insights such as whether a phone is active or disconnected, a device is reachable or unreachable and its roaming status.



A TeleSign API that uses intelligence on when a phone number has been truly deactivated, based on carriers’ phone number data and our proprietary analysis, to deliver a date and time stamp, in the event a trust anchor has been broken.




Not all product features are available in all markets. Contact sales for specific country coverage.




Delivers ongoing key phone number data attributes to help make better decisions about new registrations and user activity.


Delivers deep number-related indicators to assist in detecting fraud and help evaluate risk of end-user verification.


Ensures you swiftly receive real-time data on phone numbers in the optimal format for faster decision-making on user verification.

“The network that TeleSign has is an enormous advantage and it is exactly what we needed.”

Ryan Ogle

Chief Technology Officer, Tinder

How It Works

A common use case and method for leveraging TeleSign’s PhoneID APIs is to use it as a passive indicator of risk during the initial account creation process for end users when doing phone verification:

When a new user registers for a Web or mobile account, the user’s number is automatically checked against a variety of phone number attributes.
Certain phone number attributes can be triggered to challenge end-users in the verification process, utilizing TeleSign's verification APIs.
If a new registrant should be challenged, TeleSign can deliver a time-based, one-time verification code to the user’s mobile phone via SMS or voice message or send a push notification via mobile app. If the verification fails, account creation can then be blocked.
If successful, the new end-user account can be created, establishing a "trust anchor" for the account, and the user is authenticated into the service.


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