geolocation - how to determine location based on ip

Question

how do one determine location based on ip? I'm not asking for any product or service, but rather how to go about implementing it technically.
The ip to country is a rather static mapping. What about more specific locations?

Answer 1

geobyte is a good service to locate ip address. If you are thinking about an algorithm to find location based on IP, I think there is none. It is basically a database look up and you will retrieve the location based on the IP address.