iSubnet

iSubnet is the ultimate networking companion utility designed for network engineers, system administrators, and IT students. Quickly perform calculations, partition networks, and export data directly from your device.

Whether you're studying for your CCNA or designing complex enterprise networks, iSubnet provides lightning-fast results in a clean, modern interface.

Key Features:
• IPv4 & IPv6 Calculators: Instantly calculate CIDR, subnet masks, wildcard masks, usable IP ranges, broadcast addresses, and total host capacities.
• Bulk IP Subnetting: Generate comprehensive address lists automatically for multiple subnets at once.
• Advanced VLSM Partitioning: Design custom Variable Length Subnet Mask distributions by specifying exact host requirements.
• Report & CSV Export: Instantly export your calculation tables to formatted text reports or CSV spreadsheets for seamless documentation and team sharing.
• Unlimited History & Notes: Save and manage your network configurations on the fly.
• Theme Colors: Personalize your workspace with a curated set of light and dark design system accents.

Optimized for Every Device:
• Native Tablet Support: iSubnet dynamically adapts to large screens! Enjoy a beautiful, edge-to-edge layout optimized for Android Tablets and foldables in both portrait and landscape orientations.

Privacy First & Cross-Platform Sync:
• Use Anonymously: No account required! You can use the core calculators and even unlock Pro features completely anonymously.
• Optional Cloud Sync: Want to keep your networks on all your devices? Create a free, optional account to securely synchronize your Pro purchase, notes, and saved configurations across both Android and iOS devices.

Stop relying on slow web calculators. Download iSubnet and carry a professional-grade networking toolkit in your pocket!