Subnet Calculator

Subnet Calculator by Xerobi Lab is a powerful networking toolkit designed for network engineers, system administrators, cybersecurity professionals, cloud architects, students, and anyone working with IP networks.

Whether you're planning enterprise infrastructure, designing VLANs, preparing for networking certifications, troubleshooting connectivity issues, or learning subnetting for the first time, Subnet Calculator helps you perform accurate calculations quickly and confidently.

Stop switching between multiple tools and spreadsheets. Get everything you need for IPv4 and IPv6 subnet planning in one fast, reliable application.

With Subnet Calculator, you can calculate IPv4 subnets instantly, analyze CIDR blocks, determine network and broadcast addresses, identify usable host ranges, generate subnet masks and wildcard masks, and view complete network information with just a few taps.

Need advanced subnet design? Use the built-in VLSM calculator to efficiently allocate address space based on host requirements and create optimized subnet plans. Generate FLSM networks for environments that require consistent subnet sizing and structured network layouts.

The app also includes powerful IPv6 tools to help you work with modern network deployments. Analyze IPv6 prefixes, split networks into smaller segments, identify address types, generate reverse DNS information, and simplify IPv6 planning without complex manual calculations.

Additional networking utilities include route summarization and supernetting, IP address information lookup, binary conversion, hexadecimal conversion, decimal conversion, class identification, wildcard mask calculations, and IP-to-binary conversion tools.

Students and certification candidates can strengthen their networking knowledge with built-in subnetting practice tools and learning resources. Whether you're preparing for CCNA, CCNP, Network+, or university networking courses, the app helps reinforce real-world subnetting concepts through practical exercises.

Subnet Calculator is built with a clean, professional interface focused on speed and clarity. Results are organized and easy to understand, helping reduce mistakes during planning, deployment, and troubleshooting. Important calculations can be saved for future reference, exported when needed, and shared with teammates or classmates.

Perfect for:

• Network Engineers
• System Administrators
• Cloud Engineers
• Cybersecurity Professionals
• DevOps Engineers
• IT Support Teams
• Students and Certification Candidates

Key Features:

• IPv4 Subnet Calculator
• IPv6 Calculator and Analysis Tools
• CIDR Calculations
• VLSM Calculator
• FLSM Calculator
• Route Summarization and Supernetting
• Network Address and Broadcast Calculations
• Subnet Mask and Wildcard Mask Tools
• IP Address Information Lookup
• Binary, Decimal, Octal, and Hexadecimal Conversion
• IP Address to Binary Conversion
• Subnetting Practice Questions
• Save and Share Results
• Fast and Accurate Calculations
• Modern Light and Dark Themes

Designed by Xerobi Lab to provide networking professionals and learners with a dependable tool for subnetting, IP planning, network design, and address management.

Download Subnet Calculator today and simplify your networking workflow with fast, accurate, and professional-grade IP calculation tools.