Numlookup is a data broker that collects and sells personal information such as mailing addresses, phone numbers, and emails to marketers and other third parties. If you want to protect your privacy and reduce how your data is shared, you can submit an opt-out request directly with Numlookup. The process is usually straightforward, but it requires you to provide certain details to verify your identity. Follow the steps below to remove your information from Numlookup's databases.