ipgeolocation.io - Free IP Geolocation API and Accurate GeoIP Lookup Location Database
IP-Toolbox.com - IP-Toolbox.com is the best site for quick and easy viewing of your public IP address and other related information.
ipinfo.io - Simple IP address information.
GRC Port Scan - GRC Internet Security Port Scanner. Tests for open ports on your external IP address.
ipdata.co - Get the Geolocation, Organisation, Currency, Timezone, Calling Code, Flag, Proxy, Tor and Threat intelligence data from any IPv4 or IPv6 address.
whatismyip.cc - External IP Address lookup tool with option to scan the external IP address.