🖥️

Subnet Calculator

Inputs

IP Address

Enter in dotted decimal notation (e.g., 192.168.1.0)

CIDR Prefix(bits)

Network prefix length (0-32). Example: 24 for /24 or Class C

Subnet Mask

—

Standard dotted decimal subnet mask

Network Address

—

First address in the subnet

Broadcast Address

—

Last address in the subnet

First Usable Host

—

Last Usable Host

—

Total Hosts

—

Usable Hosts

—

CIDR Notation

—

Formula

Subnet Mask = (2^32 - 1) << (32 - CIDR), Network = IP & Subnet, Broadcast = Network + (2^(32-CIDR) - 1)