ProxyCheck.io - proxycheck.io is a premium Proxy detection API with a full featured free plan. Try us today!
ipgeolocation.io - Free IP Geolocation API and Accurate GeoIP Lookup Location Database
IP Location - IPLocation.io provides a free lookup tool to check the location of your Public IP Address. It finds this data through various GEO IP databases and online services. Just enter an IP and check its location easily.
ipinfo.io - Simple IP address information.
ipdata.co - Get the Geolocation, Organisation, Currency, Timezone, Calling Code, Flag, Proxy, Tor and Threat intelligence data from any IPv4 or IPv6 address.
ipstack - ipstack is a free, real-time IP address to location JSON API and database service supporting IPv4 and IPv6 lookup.