SuperSubnet Calculator

A must for any sysadmin or network monkey, SuperSubnet Calculator makes short work of determining the correct netmask, network, broadcast and typical default gateway parameters for a network. Small, simple and obvious, SuperSubnet Calculator makes short work of IP subnet math, and is sure to become a valuable tool in your arsenal.

Note a few points of usability to address reviews:

1. There was a stupid error in 1.0 which would cause the app to crash when no network was present. This is fixed in 1.1, now available on the iTunes App Store (a free update, of course).

2. Tapping the Gateway item will cause the default gateway to toggle between the top-most and bottom-most addresses in the subnet. As a reviewer pointed out, neither of these is guaranteed to be the default gateway of a network (indeed, a network isnt guaranteed to have a default gateway at all), but one of them is likely to be correct in most, if not all, cases.