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
1Jakub70
2Darrell69
3Pavel58
4Peter3Name57
5Russ53
6Cannabista52
7Francois van Niekerk48
8Ranjani48
9TWGT46
10Mallikarjun46