A /24 gives 254 usable hosts, a /25 gives 126, a /26 gives 62 — each bit halves the available addresses?

A /24 gives 254 usable hosts, a /25 gives 126, a /26 gives 62 — each bit halves the available addresses.

VLSM is essential for efficient IP allocation — assign subnet sizes based on actual host needs instead of wasting addresses?

VLSM is essential for efficient IP allocation — assign subnet sizes based on actual host needs instead of wasting addresses.

The wildcard mask is the inverse of the subnet mask — you need it for ACLs in Cisco routers.

Calculate IP subnets, CIDR ranges, usable hosts, and split networks with VLSM — the ultimate network planning tool

Calculate IP subnets, CIDR ranges, usable hosts, and split networks with VLSM — the ultimate network planning tool, in your browser.

1Enter a CIDR notation (e.g., 192.168.1.0/24) in the input field.
2View the subnet information: network address, broadcast, first/last host, subnet mask, wildcard mask, and usable host count.
3Use the Split Network tab to divide the subnet into smaller equal-sized subnets.
4Use the VLSM tab to allocate subnets based on different host requirements.
5Review IP class and type (private/public) information.

A /24 gives 254 usable hosts, a /25 gives 126, a /26 gives 62 — each bit halves the available addresses.
VLSM is essential for efficient IP allocation — assign subnet sizes based on actual host needs instead of wasting addresses.
The wildcard mask is the inverse of the subnet mask — you need it for ACLs in Cisco routers.

Free: subnet info only. Starter+: network splitting and VLSM.

OneKitTools TeamUpdated 2.21.4