Binary Subnet Mask Calculator

View subnet masks in binary format. Visualize network and host bits for any prefix length.

38.0Kuses
8.1/10(126)
/0/8/16/24/32
Subnet Mask255.255.255.0
Wildcard Mask0.0.0.255
Network Bits24
Host Bits8

Binary Representation

Mask: 11111111.11111111.11111111.00000000
Wild: 00000000.00000000.00000000.11111111

How to Use

Adjust the prefix slider to see the subnet mask in binary, decimal, and wildcard formats.

Disclaimer: This tool is provided “as is” for informational and educational purposes only. Results may not be 100% accurate. ToolBird makes no warranties, express or implied, regarding the accuracy, reliability, or completeness of any output generated by this tool. This tool does not constitute professional, legal, financial, medical, or tax advice. Always consult a qualified professional for important decisions. By using this tool, you agree that ToolBird and its operators shall not be held liable for any damages, losses, or consequences arising from the use of this tool or reliance on its results. All processing occurs in your browser — we do not store, transmit, or access your data. Use at your own risk.