How do I calculate subnets for an IP address?

Enter an IP address and CIDR notation or subnet mask in Toollo's subnet calculator. It will display the network address, broadcast address, usable host range, and total number of hosts.

Does the calculator support both IPv4 and CIDR notation?

Yes, you can input subnets using either dotted decimal notation (e.g., 255.255.255.0) or CIDR prefix length (e.g., /24). Toollo converts between formats automatically.

Is the subnet calculator free?

Yes, Toollo's subnet calculator is completely free and runs in your browser. It's a quick reference tool for network engineers and IT professionals — no signup required.

Subnet Calculator

Calculate IP subnet ranges

Input

IP Address

CIDR Prefix Length: /24

Subnet Mask (alternative)

Network Information

Network Address192.168.1.0

Broadcast Address192.168.1.255

First Usable Host192.168.1.1

Last Usable Host192.168.1.254

Usable Hosts254

IP ClassC

Subnet & Wildcard Masks

Subnet Mask255.255.255.0

Wildcard Mask0.0.0.255

CIDR Notation/24

IP Address (Binary)

19211000000

16810101000

100000001

000000000

Full Binary11000000.10101000.00000001.00000000

Subnet Mask (Binary)

25511111111

000000000

Full Binary11111111.11111111.11111111.00000000

CIDR Range Summary

192.168.1.0/24

192.168.1.0 – 192.168.1.255 (254 usable hosts)

FAQ

How do I calculate subnets for an IP address?: Enter an IP address and CIDR notation or subnet mask in Toollo's subnet calculator. It will display the network address, broadcast address, usable host range, and total number of hosts.
Does the calculator support both IPv4 and CIDR notation?: Yes, you can input subnets using either dotted decimal notation (e.g., 255.255.255.0) or CIDR prefix length (e.g., /24). Toollo converts between formats automatically.
Is the subnet calculator free?: Yes, Toollo's subnet calculator is completely free and runs in your browser. It's a quick reference tool for network engineers and IT professionals — no signup required.