The ultimate online investigation tool. Find out everything about a domain name, IP address, or provider. Discover relations between them and see historical data. Use it for your digital investigation, fraud prevention, or brand protection. Premium website access is for IT professionals. You get more page views, alerts, data, and premium features. Month and year plans are available. Our premium API enables programmable access to our data and tools. Access our data and tools directly from your favorite browser. Our most-used browser extension, with over 150,000+ users, allows you to see detailed IP addresses, domain names, and provider information for the current website. This browser extension displays detailed information without leaving the current website. The information can, for example, be used for online investigation. The tooltip provides information on the city, region, and country name, and the popup reveals additional domain details.