Calculate IPv4 IP address ranges, number of hosts, broadcast address, and subnets masks simply with the Subnetting Calculator. The Subnetting Calculator preforms both traditional classful (A, B, C) subnet mask and classless (CIDR) subnet mask calculations.

- Classless Inter Domain Routing (CIDR)
- Classful (A, B, C)
- Designed for network administrators.
- Easy to use IPv4 addressing calculator.

What’s New

Version 2.2.1

This app has been updated by Apple to use the latest Apple signing certificate.

Updated look and feel.
Fix selector bug on iOS 8+

Ratings and Reviews

3.8 out of 5
4 Ratings

4 Ratings

App Privacy

The developer, Rooster Glue, Inc., has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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