Free · Available on the App Store

The Subnet Calculator
for iPhone & iPad

Calculate subnet masks, usable IP ranges, and broadcast addresses instantly. The go-to tool for network engineers and CCNA/Network+ students.

Download on the App Store

★★★★★ 4.7 · 55 ratings

Features

Everything you need for subnetting

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Subnet Calculation

Instantly calculate subnet masks, usable IP address ranges, network numbers, and broadcast addresses from any CIDR input.

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Binary & Hex Display

Visualize full binary and hexadecimal representations — perfect for understanding exactly where network and host bits divide.

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Save Your Networks

Save calculated subnets for later reference. Build up a library of your most-used network configurations without re-entering them.

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Exam Study Aid

Designed with CCNA and Network+ candidates in mind. The binary display mode helps you internalize subnetting concepts, not just get answers.

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Fast & Lightweight

At just 8.5 MB, Subnet Plus launches instantly and works completely offline. No account required.

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30 Languages

Fully localized in English, Spanish, French, German, Japanese, Chinese, Arabic, and 23 more languages for network engineers worldwide.

Works across all your Apple devices

One download, every Apple platform. Subnet Plus is optimized for each screen size and interaction model.

iPhone — iOS 9.1 or later
iPad — iPadOS 9.1 or later
iPod touch — iOS 9.1 or later
Mac — macOS 11.0+, Apple Silicon
Apple Vision Pro — visionOS 1.0+
Apple Watch app icon support

Localization

Available in 30 languages

EnglishSpanish FrenchGerman JapaneseSimplified Chinese Traditional ChineseKorean ArabicPortuguese ItalianDutch RussianPolish TurkishSwedish DanishFinnish NorwegianGreek HebrewCzech SlovakHungarian RomanianCatalan IndonesianMalay ThaiVietnamese

The Subnet Calculator
for iPhone & iPad