GRC Port Scan Alternatives

GRC Port Scan is described as 'GRC Internet Security Port Scanner. Tests for open ports on your external IP address' and is an website in the security & privacy category. There are more than 10 alternatives to GRC Port Scan, not only websites but also apps for a variety of platforms, including Android, iPhone, Android Tablet and Windows Phone apps. The best GRC Port Scan alternative is IP Guide, which is free. Other great sites and apps similar to GRC Port Scan are ip.me, whatismyip.cc, sploit.io and What is My IP Address.