IPv4 · CIDR

Subnet Calculator

IPv4 CIDR → network, broadcast, mask, wildcard, host range. Runs entirely client-side.

IP / CIDR

Quick presets

RESULT · live

USABLE HOSTS

254

Network192.168.1.0

Broadcast192.168.1.255

Mask255.255.255.0

Wildcard0.0.0.255

First host192.168.1.1

Last host192.168.1.254

CIDR/24

Total addrs256

How it works

Bitwise AND of the address with the netmask derived from CIDR — zero network calls.

Edge cases

/31 and /32 use RFC 3021 point-to-point semantics — all addresses usable.

Pro tip

Plan POP-level subnets in /22 chunks for clean IPv6 migration paths.

OTHER TOOLS