## Phone number validation

Validate the legitimacy of customer phone numbers to reduce delivery errors.

- Based on the number format, identify the country, time zone, and validate if it is assigned to a subscriber
- Minimize fraud while ensuring a verified way to contact customers in the future
- Discover current and original carrier to optimize SMS routing
- Control costs and avoid wasteful marketing spend

## Fraud detection and step-up verification

Prevent costly fraudulent transactions using updated phone number intelligence.

- Identify possible fraudulent activity and trigger step-up authentication when needed
- Reduce customer friction with additional steps only for suspected numbers
- Leverage Identity Insights to deliver real-time phone number intelligence that enhances your risk decision engine
- Determine if a phone number is valid and block synthetic identities through carrier KYC records
- Add a second layer of security with [Verify 2-Factor Authentication](https://www.vonage.com/communications-apis/verify/ "Go to Verify API page")
- Detect SIM Swap fraud: Identify if a phone's SIM was recently changed

## Onboarding and KYC

Use Subscriber Match to streamline onboarding and validate users with trusted carrier data — no documents, no drop-offs.

- Cross-check user attributes (name, address, and date of birth) against mobile operator KYC records in real time
- Speed up onboarding and increase conversions by removing manual steps
- Replace manual document reviews with instant, automated KYC
- Prevent synthetic identity fraud by detecting mismatched or fake information
- Confirm user age by validating date of birth through verified carrier records

### Zero Trust: How Network-Powered APIs are Changing the Game

This whitepaper explores how businesses can stay ahead of identity-based attacks and implement smarter, seamless security without compromising the user experience.

[Learn more](https://www.vonage.com/resources/publications/zero-trust-network-powered-apis-changing-game/)

#### Own Your Security and safeguard both your business and your customers

[**Protect Your Business** \ 
Defend your brand with next-gen solutions that prevent, detect, and report fraudulent activity.](https://www.vonage.com/communications-apis/protect-your-business/)

[**Protect Your Customers** \ 
Simplify and secure the authentication process … so customers can focus on doing business with you.](https://www.vonage.com/communications-apis/protect-your-customer/)