Subnet Calculator - Professional IP Subnet Tool

🔢 IP Subnet Calculator

Enter an IPv4 address and CIDR prefix to calculate subnet details instantly.

IP Address

CIDR Prefix

Subnet Mask

Network Address

192.168.1.0

First address in subnet

Broadcast Address

192.168.1.255

Last address in subnet

Usable Host Range

192.168.1.1 – 192.168.1.254

Assignable to devices

Total Hosts

256

2^(32−CIDR)

Usable Hosts

254

Excluding network & broadcast

Wildcard Mask

0.0.0.255

Inverse of subnet mask

IP Class

Based on first octet

CIDR Notation

192.168.1.0/24

Full network specification

🧬 Binary Subnet Mask

11111111.11111111.11111111.00000000