Developer / Networking

IPv4 Subnet Calculator

Calculate network ranges, broadcast addresses, host counts, and subnet masks for IPv4 blocks directly in your browser. Handy for home labs, firewall rules, infra docs, and quick subnet sanity checks.

IPv4 addressCIDR prefix

Status

Loaded starter LAN subnet

Subnet details

Mask: 255.255.255.0

Network: 192.168.1.0

Broadcast: 192.168.1.255

First host: 192.168.1.1

Last host: 192.168.1.254

Usable hosts: 254