Part of the value of Trace Labs is not only helping families find their loved ones but also to help information security enthusiasts to practice their open source intelligence skills. The posts categorized as Techniques such as this one contains tips for performing OSINT.
While not always very accurate, IP Location Finder: https://www.iplocation.net can help you geolocate an IP address. Normally this will just tell you the provider and the city where that company is based. While this is helpful, it does not necessarily tell you where the actual end user of that IP address resides. It is more registration location rather than end user location.