API returns location data such as country, city, latitude, longitude, timezone, asn, currency, security data for IPv4 and IPv6 addresses in JSON or XML formats.

Geocoding is the process of converting addresses (like "1600 Amphitheatre Parkway, Mountain View, CA") into geographic coordinates (like latitude 37.423021 and longitude -122.083739), which you can use to place markers on a map, or position the map.

Find nearest or largest city information or timezone for any given point location (latitude/longitude). The reverse geocode API back "reverse" codes any GPS location point into nearest or largest readable places with county, city, distance and population.

Get global city, region, and country data. Filter and display results in multiple languages.

Telize offers a JSON IP and GeoIP REST API allowing to get a visitor IP address and to query location information from any IP address. It outputs JSON-encoded IP geolocation data, and supports both Cross-origin resource sharing (CORS) and JSONP.

US Zipcode, County, City, and State Boundaries API:A simple & very fast API that will allow you to integrate multiple GeoJson US boundaries results into your apps and systems.This API is designed to be used programmatically for optimal performance.

Forward and Reverse Geocoding