Calculate subnet masks, usable IP ranges, and broadcast addresses instantly. The go-to tool for network engineers and CCNA/Network+ students.
Features
Instantly calculate subnet masks, usable IP address ranges, network numbers, and broadcast addresses from any CIDR input.
Visualize full binary and hexadecimal representations — perfect for understanding exactly where network and host bits divide.
Save calculated subnets for later reference. Build up a library of your most-used network configurations without re-entering them.
Designed with CCNA and Network+ candidates in mind. The binary display mode helps you internalize subnetting concepts, not just get answers.
At just 8.5 MB, Subnet Plus launches instantly and works completely offline. No account required.
Fully localized in English, Spanish, French, German, Japanese, Chinese, Arabic, and 23 more languages for network engineers worldwide.
iPad
One download, every Apple platform. Subnet Plus is optimized for each screen size and interaction model.
Localization
Free to download. Just a solid subnet calculator.