We process and aggregate tons of data from multiple sources to generate the most accurate and reliable source of IP addresses data. We are currently using MaxMind data to surface GeoLocation information in our API, hence why even though we are already in the process of building our own GeoLocation database we are required to state:
SmartIP enables you to locate your website visitors. The data received from our API can be used to enrich the user experience based on our GeoLocation data. You can also assess threats and risks for your web application via our state of the art Security data. With SmartIP you can gather Crypto data behind any IP address and know if it is an active Bitcoin node currently connected to the Blockchain.