Subnet Calculator

Fast IPv4 / CIDR subnet calculator for network planning & documentation.

IPv4 / CIDR Input Live Calculator

IP Address

CIDR

Tip: click a preset below to try common private ranges.

192.168.1.0/24 Home LAN

10.0.0.0/24 Private

172.16.0.0/16 Private

/26 64 hosts

/30 Point-to-point

Network Address

Broadcast Address

First Usable

Last Usable

Total Addresses

Usable Hosts

Subnet Mask

Wildcard Mask

Binary View

Enter an IP and CIDR to see bit-level details.