IP2Location - IP Geolocation Global Web Service via REST API (4 Billion IP addresses)

IP2Location™ IP Geolocation web service is a REST API providing a service to do a reverse IP location lookup for ISO3166 country code, region or state, city, latitude and longitude, ZIP/Postal code, time zone, Internet Service Provider (ISP) or company name, domain name, net speed, area code, weather station code, weather station name, mobile country code (MCC), mobile network code (MNC) and carrier brand, elevation, and usage type. To search, submit a query string and a set of parameters to the IP2Location™ REST API service and you will get the IP location lookup within seconds. Search results are derived from the IP2Location™ index of over 4 billion unique IP addresses.