IP address geolocation SQL database :: IPInfoDB
http://ipinfodb.com/ip_database.php
Complete (City)
The SQL database behind ipinfodb.com is offered for free. We offer the database in different formats (SQL, CSV), city or country precision, 3 or 4 IP digits precision and data in single or multiple tables. Available information in the database : ISO country code, country name, FIPS region code, region name, city, zipcode, latitude, longitude and GMT/DST timezone. The database is updated during the first week of each month.3 Free Ways to Geolocate By IP
查IP 的api
An article describing how to geo-localize IP.