ネットマスクレーター ネットマスク計算を一瞬で

Netmask crater Netmask calculation in an instant.
It is a tool that instantly performs netmask calculations that network engineers and infrastructure engineers need to perform frequently.
As a function,
・ Calculate the netmask and find out the available addresses.
・ Know which class the address belongs to
・ You can see the class information of the private IP address as reference information.
・ Engineers can operate offline, such as on-site work
・ Since there is a function to save the calculation result, frequently calculated information can be confirmed in a separate list.

This tool is completely free.