Subnet-Calculator
IPv4/IPv6 subnet & CIDR tool
$0.99 · Designed for iPad. Not verified for macOS.
For network engineers, sysadmins & students: enter an IP and prefix to instantly get the network, broadcast, usable hosts, mask and binary. IPv6 and VLSM included.
Subnet Calculator is a clean, professional networking tool for network engineers, sysadmins, CCNA/CCNP students and developers. Enter an IP address and a prefix (or CIDR) and instantly get every subnet detail you need.
IPv4 CALCULATIONS
• Network and broadcast addresses
• Usable host range and host count
• Subnet mask, wildcard (inverse) mask, hex mask
• Address class (A/B/C/D/E) and category (private / public / loopback / link-local / multicast …)
• Binary view with the network and host portions colour-coded
• Convert freely between mask and CIDR prefix
• Correct handling of /31 (point-to-point) and /32 (single host)
IPv6 CALCULATIONS
• Address compression (::) and full expansion
• Address type detection (global unicast / link-local / unique local / multicast …)
• Network prefix, first and last address
• Total address count (shown as a power of two and exact value), number of /64 subnets
SUBNETTING
• Equal split: divide a network by a new prefix and list every subnet
• VLSM: allocate the right-sized subnet for each host requirement automatically
WHY YOU'LL LIKE IT
• 100% offline — no network access, no data collected, full privacy
• Tap any result to copy it
• Dark mode, universal for iPhone and iPad
• English & Chinese, follows your system language
• Clean interface, no ads
Whether you're planning a network, studying for a certification, or troubleshooting on the job, this tool gets your subnet math done fast and accurately.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, 敬东 孙, 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 敬东 孙
- Size
- 2.5 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Simplified Chinese
- Age Rating
4+
- 4+
- Copyright
- © 2026 敬东 孙
