I was evaluating the Free Geo IP Webservice provided by FreeGeoIP.net for one of my Enterprise Clients. They are looking for a 'free' solution if available, because in terms of volume, their need is small. A major question is given the highest priority. Is the data authentic and trustworthy? Have you used this service for IP to location tracking in any of your projects? If yes, what is your experience on its trustworthiness?
I know about Maxmind and couple of others. And FreeGeoIP.net claims that their data is provided by Maxmind itself. But is that statement true? Please let me know if you have bad experience with the availability of the service.