PenyuScanner

PenyuScanner is a straightforward piece of software that you can use to scan multiple IP addresses by range, in order to find out whether or not they're available. It features advanced options that are intuitive enough for users less experienced with networking tools.

Setup, prerequisites, and interface

Setting it up takes minimal time and effort, thanks to the fact that there are no special options or third-party offers involved. However, you must have .NET Framework installed, since it was built with the aid of this platform.
It's wrapped in a user-friendly interface made from a standard .NET Framework form with some emphasized graphical elements, where you can specify the starting IP address for the scanning operation.

Scan IP addresses and create a report

The status of each scanned IP address can be viewed in the main window, and the utility can be instructed to automatically write these details to a report file, which is a plain text document placed in the installed directory.
In addition, you can modify the default ping timeout (seconds), stop the scanner if it takes too long or if you change your mind, as well as open the report file without leaving the interface, in order to find out the availability of the specified IP addresses.

Evaluation and observations

It didn't put a strain on PC performance in our tests, since it needed a low amount of CPU and RAM to quickly perform IP address scan operations. No error dialogs popped up and it didn't freeze or crash.
Although it hasn't received updates for a long time, it worked smoothly on newer Windows models in our tests. On the other hand, it doesn't give the possibility to set the ending IP address when defining the range.

Conclusion

To sum it up, PenyuScanner provides you with a fast and simple method for scanning IP addresses to find out if they're available or not. It can be easily used by anyone and it's free.