Mobile phone numbers have long become a part of our identity. At the same time, many online and mobile services are delivering one-time passwords over SMS for the purpose of account registration or two-factor authentication. This has created significant opportunities for fraudsters who are exploiting insufficiently secured services for their own gain. The NetNumber Mobile Number Information (MNI) service brings in real-time phone number intelligence to help prevent such fraud. MNI determines if a phone number is assigned to a mobile subscriber, allowing financial institutions and all types of service providers (OTTs, social networks, mobile / online services etc.) to enhance their user verification screening. This mitigates, and in some cases eliminates, the damage that can be caused by those attempting to create fake accounts using invalid numbers. MNI allows for existing user data to be scrubbed regularly and users with inactive phone numbers can be prompted to update their account in order to keep it secure.