Subnet Calculator

Calculate network addresses, broadcast addresses, and usable host ranges.

Enter IP Address

IP Address

CIDR / Prefix

Subnet Information

Network Address -

Broadcast Address -

Subnet Mask -

Wildcard Mask -

First Usable Host -

Last Usable Host -

Total Hosts -

Usable Hosts -

IP Addresses List

Showing 0 usable IP addresses

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Binary Visualization

IP Address -

Subnet Mask -

Network -

About Subnetting

What is Subnetting?

Subnetting divides a network into smaller subnetworks. It helps organize networks, improve security, and reduce broadcast traffic.

CIDR Notation

CIDR (Classless Inter-Domain Routing) notation represents the subnet mask as a suffix (e.g., /24). The number indicates how many bits are used for the network portion.