How to identify virtual and disposable phone numbers?

Disposable and virtual phone numbers, generated via VoIP technology through online services, present a significant challenge for businesses, as they are frequently used to bypass verification processes, leading to fraudulent activities such as fake account creation, spam, and SMS cost inflation. These numbers, which can be rented for short durations and are not tied to physical SIM cards, are used for privacy protection, testing by developers, and to create anonymous profiles, but they are also exploited by fraudsters for free trial abuse, fraudulent calls, and automated sign-ups. Studies have revealed that disposable numbers are used globally, affecting various sectors, including social networks, banking, and e-commerce, and posing threats to application integrity and revenue. Companies like Prelude offer phone number validation services to help businesses detect and prevent the use of disposable numbers by maintaining comprehensive databases of such numbers, thus protecting platforms from fraud and ensuring that verification processes reach genuine users, as demonstrated by BeReal's significant reduction in fake traffic and operational costs.