Tools
IP Address Tools
Calculate subnet ranges, CIDR notation, and convert between IP formats. Supports IPv4 subnet calculation.
Subnet Mask
255.255.255.0
Network
192.168.1.0
Broadcast
192.168.1.255
Host Count
254
First Host
192.168.1.1
Last Host
192.168.1.254
How to use this tool
Calculate subnet ranges, CIDR notation, and convert between IP formats. Supports IPv4 subnet calculation. This tool is designed to help developers complete one focused task quickly, with clear input and output in the browser.
Suggested workflow
- Enter or select the data you want to work with.
- Use the IP Address Tools controls to produce or inspect the result.
- Review the result, then copy or download it for your workflow.
Good to know
Your input is processed in the browser unless the tool explicitly makes a network request.
IP Address Tools - CodeTools Toolbox - 47 free online developer tools.