Hostip.info is an open-source project with the goal to build/maintain a database mapping IP addresses to cities. Their about page explains the data sources relied on to populate this database.
Using HostIP, there are two ways to get location data from an IP address:
They also have a well-designed and easy-to-use RESTFUL API: just pass in your ip address after the i***p=*** in the GET request string):
import urllib
response = urllib.urlopen('http://api.hostip.info/get_html.php?ip=12.215.42.19&position=true').read()
print(response)
Second, the Project Website also makes its complete database available for download.
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