A free program for Android, by ManageEngine.

Ping Tool – DNS, Port Scanner is an all-in-one network monitoring tool that you can easily download on your Android device. With this app, you can stay on top of your network’s availability, performance, and security by monitoring servers, desktop machines, and network devices such as routers and switches.

In addition to network monitoring, this app offers the capability to perform DNS lookup and scan for open ports, which ensures your servers are secure. You can keep track of everything in real time with the ability to monitor multiple devices simultaneously. It is a great tool for IT professionals, network administrators, and more.