IP Calc(ipv4/ipv6)
One-Tap IP/Subnet Calc
Only for iPhone
$0.49 · Designed for iPhone. Not verified for macOS.
iPhone
Precision IPv4 & IPv6 subnet math on iPhone. Numeric-only keypad, subnet division, route summarization, and a guided wizard — built for network engineers in the field.
IP Calc is the precision subnet calculator for network engineers, SREs, students, and anyone who works with CIDR every day. Built natively for iPhone, it brings IPv4 and IPv6 calculation, subnet division, route summarization, and a guided subnet wizard into one clean, fast, offline-capable toolkit.
No input-mode dance. No rogue letters in an IP address. Just a numeric-only keypad, a beautiful interface, and results you can trust.
— CORE FEATURES —
IPv4 Calculator
• Instant network address, broadcast address, and usable host range from any IP + CIDR
• Subnet mask and wildcard mask
• First / last usable host, total and usable host count
• Automatic classification: Private, Public, or Reserved
• Editing the IP does not reset your CIDR — calculations stay consistent
IPv6 Calculator
• Expanded and compressed (::) address forms
• Network prefix, first and last addresses
• Scope detection: Global Unicast, Link-Local, Unique Local, Multicast
• Interface ID breakdown and zone index support
• EUI-64 generation directly from a MAC address
Subnet Wizard
• Answer a few simple questions and get a complete subnet plan
• No mental arithmetic, no scratch paper
• Great for designing new networks and preparing for certification exams
Subnet Division Simulator
• Split any network into N equal subnets, or down to a target prefix length
• See every resulting network, usable range, and broadcast in a clean list
• Tap any row for full subnet details
Route Summarization (Aggregation)
• Enter multiple IPv4 or IPv6 prefixes and get the smallest aggregate that covers them all
• Perfect for writing tighter ACLs, cleaner BGP advertisements, and leaner route tables
• Bit-level matching — no guesswork
History & Favorites
• Every calculation is saved locally on device
• Pin the ones you use most as favorites
• Return to any previous result in one tap
— BUILT FOR iPHONE —
• Numeric-only keypad on IP and prefix fields — digits and dot, nothing else
• Tap-to-copy on every result field
• Bilingual UI (English / 日本語), switchable from the header
• Monospace font on all results so digits line up and errors jump out
• 100% on-device calculation — works completely offline
— WHO IT'S FOR —
Network engineers, SREs, DevOps and cloud engineers, NOC technicians, ISP operators, datacenter teams, security engineers, system administrators, IT instructors, and students studying for CCNA, CCNP, Network+, or any networking certification.
If you routinely do subnet math on the job or on the bench, IP Calc will save you minutes every day — and help you avoid costly mistakes.
Download IP Calc and make your next subnet calculation effortless.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Improved usability
Added subnetting functionality
Added route summarization functionality
The developer, MASAHIRO HIRAIWA, 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
- MASAHIRO HIRAIWA
- Size
- 32.9 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2025 Hiraiwa
