Articles
Subnetting, Explained
Plain-English guides to IP subnetting — what a subnet really is, and how to read the CIDR notation that describes one. No jargon, no sign-up.
Beginner
What Is a Subnet? IP Networks Explained Simply
How a single IP address splits into a network part and a host part, why networks are divided into subnets, and how the mask draws the line — explained from scratch with examples you can run in the calculator.
Read ConceptCIDR Notation Explained: Reading /24, /26 and /64
What the slash-number really means, how prefix length maps to mask and host count, and the quick mental math for sizing IPv4 and IPv6 networks without a lookup table.
Read ReferenceCIDR Notation Chart: /0 to /32 Cheat Sheet
A complete reference table of every IPv4 prefix with its subnet mask, wildcard mask, host bits and usable host count — plus the common IPv6 prefixes. Bookmark it.
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