ToolNest

🌐IPv4 Subnet Calculator

Calculate subnet mask, network address, broadcast and usable hosts for any CIDR.

🆓 Free🔒 Secure⚡ Instant📱 Mobile-friendly🚫 No signup

Calculate subnet details from IP and CIDR notation online for free. Network, broadcast, usable hosts.

CIDR Notation

192.168.1.0/24
Private · Class C
Network Address
192.168.1.0
Subnet Mask
255.255.255.0
Wildcard Mask
0.0.0.255
Broadcast Address
192.168.1.255
First Host IP
192.168.1.1
Last Host IP
192.168.1.254
Usable Hosts
254
Total IPs
256

Examples

How to Use IPv4 Subnet Calculator — Step by Step

  1. 1Enter an IPv4 address and subnet mask (CIDR notation like /24 or dotted e.g. 255.255.255.0)
  2. 2Click 'Calculate' — network address, broadcast address, usable host range, and total hosts are shown
  3. 3Wildcard mask, binary representation, and class are also displayed
  4. 4Copy any field value for use in network configuration

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Frequently Asked Questions

Is this tool completely free?

Yes. All ToolNest tools are 100% free with no signup required, no account, and no watermarks added to output files.

Are my uploaded files secure and private?

All uploads use HTTPS encryption during transfer. Files are processed on secure isolated servers and automatically deleted within 2 hours of upload.

Does this tool work on mobile phones?

Yes. ToolNest works on any modern browser on iPhone, Android, tablet, or desktop — no app download or plugin needed.

Do I need to create an account?

No. Just open the tool, upload your file, and download the result. No email, no signup, no password.