ip-geolocation

I'm not looking for a service that does this. I'm just curious as to how geolocation works. Mapping IP addresses to geolocations is done via tables, where an IP maps to a particular location. This location, however, does't need to be accurate, since IP addresses don't carry any information about their locations, these are approximated . From http://en.wikipedia.org/wiki/Geolocation_software : The primary source for IP address data is the regional Internet registries which allocate and distribute IP addresses amongst organizations located in their respective service regions: American Registry

Is which IPs are assigned to which ISPs public information? How do geo IP services obtain this information and maintain this information? How can I personally figure out where a certain IP belongs without using one of these services? Alnitak For what it's worth, I worked at a senior level in the ISP industry for more than a decade so I have quite some experience with this. Large IP ranges are allocated as needed by IANA to each of the Regional Internet Registries . The regions are generally continental in size - IP addresses are not assigned on a per-country basis. The RIRs in turn then

I want to extract a user country name from visitors' IP addresses. I could get the IP address with remote_ip . But what could be the easiest way to get the country name? It doesn't have to be super accurate. Any ruby library (gem or plugin) to do this? I want an simple and easy solution for this. You can use geoip gem. environment.rb config.gem 'geoip' Download GeoIP.dat.gz from http://www.maxmind.com/app/geolitecountry . unzip the file. The below assumes under #{RAILS_ROOT}/db dir. @geoip ||= GeoIP.new("#{RAILS_ROOT}/db/GeoIP.dat") remote_ip = request.remote_ip if remote_ip != "127.0.0.1"

Is it possible to know the city name based on IP address in java? are you using jsp or what ? for city name over client side you can use google's API which will return you the geographical details of the user mapped with the IP. As google's documentation say you can get the following When populated, the google.loader.ClientLocation object is populated with the following metro-level granularity properties: * ClientLocation.latitude — supplies the low resolution latitude associated with the client's IP address * ClientLocation.longitude — supplies the low resolution longitude associated with the

I need a client side API in either Java or Ruby. I would much prefer need this to be LOCAL only. Infact this might not even be an IP, but more of a database import. The thing is that I cannot make use of a web service based one as that is too much heavy I/O for me. Note: By geolocation, all I really need is country/region at best. I would accept actual lat/long cordinates as well. I was looking at these guys a couple months ago: http://www.maxmind.com/app/geolitecountry It seemed OK, for my limited purposes. a quick google search yielded this result: http://www.hostip.info/dl/index.html I