Networking

2 tools

Free networking tools — calculate IP subnets and CIDR ranges and generate MAC addresses, instantly and privately in your browser.

IP Subnet Calculator Enter an IPv4 address and CIDR prefix to get the full subnet breakdown.

MAC Address Generator Generate random MAC addresses in your preferred format.

About our Networking

Practical utilities for network engineers and students: work out subnet masks, network and broadcast addresses and usable host ranges from any CIDR, and generate random MAC addresses for testing.

All calculations run in your browser using plain arithmetic — nothing is sent to a server.