100% Free · No limits

Network Tools

Subnet calculator, port reference guide, and client info — all in one place. Everything runs in your browser, nothing sent to a server.

Presets:
Network Address192.168.1.0
Broadcast Address192.168.1.255
First Usable Host192.168.1.1
Last Usable Host192.168.1.254
Total Usable Hosts254
Subnet Mask255.255.255.0
Wildcard Mask0.0.0.255
CIDR Prefix/24
Subnet Calculator
Calculate network addresses, broadcast addresses, host ranges, and subnet masks from CIDR notation instantly.
Port Reference
Quick-search 45+ common ports with protocol, service name, and description. Perfect for firewall rules and troubleshooting.
100% Client-Side
Your data never leaves your browser. No server calls, no logging, no tracking. Completely private.