Subnet Calculator

CIDR notation in, network address, broadcast address, subnet mask, and the usable host range out.

CIDR notation

Network address192.168.1.0

Broadcast address192.168.1.255

Subnet mask255.255.255.0

First usable192.168.1.1

Last usable192.168.1.254

Usable hosts254

Was this tool helpful?

See this same kind of analysis applied to your whole repository

Call graphs, dead code, blast radius, and a health score. Results in 60 seconds, free.

Related tools

HTTP Header Analyzer

Paste response headers, get plain-English explanations.

CIDR Overlap Checker

Check whether two CIDR blocks overlap - catch VPC peering and routing conflicts before provisioning.

Rate Limit Header Explainer

Paste X-RateLimit or RateLimit response headers - remaining quota and reset time in plain English.

Nginx / Apache Config Generator

Reverse proxy, SSL redirect, gzip - a valid server block or VirtualHost.

Runs entirely in your browser. Nothing is stored. Free forever.