IP Subnet Calculator Widget will calculate the Network Address, Broadcast Address, and number of hosts in a subnet given an IP address and Subnet Mask.
Subnet Mask may be entered in either dotted decimal notation or directly in number of bits masked.
You may also click on the Subnet Mask button to change to the Wildcard Mask view. Click again to go back to the Subnet Mask view.
RequirementsMac OS X 10.4 or later
*Previously available here