Blogs

Subnetting in Practice

Hands-on guides with worked examples — how IPv4 and IPv6 subnetting differ, and how to split a network into right-sized pieces with VLSM. Reproduce every example in the calculator.

Both posts lean on the calculator's Split into subnets mode, which takes a base block, such as 192.168.1.0/24, and carves it into equal pieces by subnet count or by hosts per subnet — the tool picks the smallest prefix that fits your requirement and lists every resulting subnet's network address, host range, broadcast address and host count. That splitting behavior is exactly what VLSM (Variable Length Subnet Masking) means: one address range divided into right-sized pieces instead of handing every segment the same fixed block. The IPv4/IPv6 comparison post covers the other half of the picture — why IPv6's /64-per-subnet convention makes host-counting largely irrelevant at the scale IPv4 engineers are used to.

Both posts assume you already know how to read a CIDR block; if /26 or /64 still needs decoding, start with the subnetting articles first, then come back and reproduce each worked example in the calculator rather than trusting the arithmetic on faith.