CidrPlan is a lightweight, browser-based IPv4 subnet planning tool that lets you interactively design and manage network address spaces. Split larger blocks into smaller subnets, merge them back together, name your networks, and export your plans in multiple formats—all without leaving your browser.
networking ipv4 subnet networks cidr vnet ipv4-address subnetting subnet-calculator cidr-range cidr-subnet subnetting-ipv4-addresses vnets
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Updated
Jan 29, 2026 - JavaScript