Given any valid IP address and subnet mask, use this calculator to determine the network IP, the first and last hosts in the network, and the broadcast address.


IP Address:
Subnet Mask: e.g. /XX or 255.255.248.0
☆ Top 10 High Scores ☆
View Full List
RankAll Star NameScore
1Peter3Name57
2Russ53
3Cannabista52
4Jakub51
5Pavel48
6Ranjani48
7Cannabista47
8TWGT46
9Mallikarjun46
10sarath45