SubnetMaster

Cannoli Shell Studios

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SubnetMaster is the ultimate network design toolkit built specifically for network engineers, IT administrators, and cybersecurity students.

Whether you are deploying a massive enterprise network, configuring a home lab, or studying for your CCNA and CompTIA Network+ exams, SubnetMaster delivers lightning-fast, accurate IP calculations in a beautiful, intuitive dark-mode interface.

Stop wasting time doing binary math by hand. SubnetMaster handles everything from standard IPv4/IPv6 calculations to complex Variable-Length Subnet Masking (VLSM) architectures, ensuring your network is efficient and conflict-free.

🚀 CORE FEATURES:

📊 Advanced Subnet Calculator
• Full support for both IPv4 and IPv6.
• Instantly calculate Network IDs, Broadcast Addresses, Subnet Masks, Wildcard Masks, and Usable Host Ranges.
• Interactive CIDR slider to adjust prefix lengths on the fly.
• Deep-dive Binary Analysis and Bit Structure visualizations to see exactly how your network is divided under the hood.

🏗️ VLSM Designer (Variable-Length Subnet Masking)
• Say goodbye to wasted IP space. Input your base network and the exact number of hosts needed for different departments (Sales, IT, IoT, etc.).
• SubnetMaster automatically calculates a perfectly optimized, overlapping-free layout.
• View your address space utilization via visual pie charts and usage bars.

🗄️ FLSM Calculator (Fixed-Length Subnet Masking)
• Need to divide a network into equal parts? Type in your base network and desired number of subnets.
• Instantly generate a perfectly portioned routing table with first/last hosts and broadcast addresses.

🎓 Interactive CIDR Training Module
• Master subnetting in your head and ace your IT certification exams!
• Built-in quiz engine with randomized questions on CIDR-to-mask conversions, wildcard masks, usable host counts, and network boundaries.
• Choose between Beginner, Intermediate, and Advanced difficulties.
• Track your progress, view your accuracy stats, and build your practice streak.

📤 Export & Share (Pro Feature)
• Export your generated VLSM and FLSM network designs in a single tap.
• Copy to clipboard, or share via Plain Text, CSV (for Excel/Google Sheets), or JSON formats for easy network documentation.

WHO IS SUBNETMASTER FOR?
• Network Engineers & Architects: Quickly design routing tables and deploy flawless VLSM network architectures.
• IT Students: The absolute best companion for CCNA, CCNP, CompTIA Network+, and CompTIA Security+ exam prep.
• System Administrators: Rapidly double-check IP boundaries, wildcards, and broadcast addresses for firewall rules and ACLs.

Upgrade your IT toolkit and design networks with total confidence. Download SubnetMaster today!

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🚀 SubnetMaster 1.0 is officially live!
Your new go-to offline subnet calculator is here. Master VLSM, FLSM, and IPv6 math on the fly, or use the built-in Training Quiz to prep for your next IT certification (CCNA, Network+). No ads, no server delays—just pure, offline networking math in your pocket.