Subnet Calculator

IP Subnet & CIDR Calculator

Free · Designed for iPad. Not verified for macOS.

Subnet Calculator puts essential subnet math in your pocket. Enter any IP and CIDR, and instantly see network address, broadcast, usable range, and more—ideal for admins, developers, and anyone planning or troubleshooting networks. ► Subnet Calculator • Support for IPv4 and IPv6; switch between them with a single tap. • Enter any IP address and adjust CIDR prefix length with a slider (/0 to /32 for IPv4, /0 to /128 for IPv6). • Instant results: network address, subnet mask, broadcast, first and last usable IP, host range, and total addresses. • IPv4: see address class (A/B/C/D/E), wildcard mask, and usable host count. • IPv6: see prefix length and total addresses in compact form (K, M, B). • Long-press any result to copy it to the clipboard. ► General • Dark and light theme. • Portrait-oriented layout for one-handed use. • No account required. Free to use, with ads to support development. Built for quick subnet planning, subnetting practice, and network design—handy for home labs, offices, and developers.

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

Updated app icon.

Version 1.6

The developer, Chun Yu Leung, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Location
    • Identifiers
    • Usage Data
    • Diagnostics

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Location
    • Identifiers
    • Usage Data
    • Diagnostics

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Chun Yu Leung
Size
  • 25.1 MB
Category
  • Developer Tools
Compatibility
Requires iOS 13.0 or later.
  • iPhone
    Requires iOS 13.0 or later.
  • iPad
    Requires iPadOS 13.0 or later.
  • iPod touch
    Requires iOS 13.0 or later.
  • Mac
    Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
  • English
Age Rating
4+
Copyright
  • © 2026 lcyu
  • Developer Website
  • Privacy Policy

    • More by Chun Yu Leung