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4. Whatmask Download

tool to convert subnet mask types and help with ip ranges

Whatmask Screenshots

Whatmask Editor's review

Whatmask is a small C program that will help you with network settings.

Whatmask can work in two modes. The first mode (which is how prior versions worked) is to invoke Whatmask with only a subnet mask as the argument. In this mode Whatmask will echo back the subnet mask in three formats, plus the number of useable addresses in the range.

Netmask notation is pretty much the standard old-school way of doing it. It is supported by most systems (Un*x, Win, Mac, etc.).

Wilcard bits are similar to the netmask, but they are the logical not of the netmask. This notation is used by a number of popular routers (and nobody knows why...)

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