ProxyCheck.io - proxycheck.io is a premium Proxy detection API with a full featured free plan. Try us today!
ipinfo.io - Simple IP address information.
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.
BigDataCloud IP Geolocation API - Next Generation IP GeolocationAPI
ipdata.co - Get the Geolocation, Organisation, Currency, Timezone, Calling Code, Flag, Proxy, Tor and Threat intelligence data from any IPv4 or IPv6 address.
ipapi - Web analytics with IP address lookup and location API