CIDR Calc vs Subnet Lab Pro

Displays subnet, IP addresses, mask, and reverse mask based on IP and CIDR notation. Generates shareable list of all subnets and hosts in next higher octet.

Subnet Lab Pro is the modern, professional toolkit designed for Network Engineers, Sysadmins, and IT Students. Whether you are configuring a corporate network, studying for your CCNA, or troubleshooting connectivity, Subnet Lab Pro provides the instant answers you need. CORE FEATURES: • Real-Time Calculator: Instantly calculate Network Addresses, Broadcast Addresses, Usable Host Ranges, and Wildcard Masks. Just type an IP and slide the CIDR selector—the math happens automatically. • Visual Binary & Hex: Understand the "why" behind the numbers. See the binary representation of every IP octet update in real-time as you calculate. • The Networking Handbook: A complete, offline pocket reference guide containing: – The OSI Model (7 Layers explained). – Common Port Numbers (Web, Email, Infrastructure, Database). – WiFi Standards (WiFi 4 through WiFi 7). – Command Line Tools (Ping, Traceroute, Dig, etc.). – Private IP Ranges (RFC 1918). • Cheat Sheets: Quick-reference CIDR tables and IPv6 basics available at a tap. • Privacy First: Subnet Lab works 100% offline. No data tracking, no ads, and no internet connection required for calculations. Master your network with Subnet Lab Pro.