Subnet Calculator

IPv4 Subnet Calculator

Enter IP/CIDR to calculate network address, broadcast address, usable address range, and subnet mask in real-time.

Calculation Result

Network

-64.-88.0.0

Broadcast

-64.-88.0.-1

Netmask

255.255.255.0

Wildcard

0.0.0.255

First Host

-64.-88.0.-255

Last Host

-64.-88.0.-2

Block Size

256

Binary Mask

11111111.11111111.11111111.00000000

Calculate subnets online, no more manual math for network segments and host ranges.

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Use Cases

When planning office network segments or cloud private networks, first calculate usable IP range and mask before applying configuration
Verify network address and broadcast address boundaries are correct when troubleshooting network configuration errors
Confirm subnet range and host count before configuring firewall or routing rules
Help understand CIDR notation and subnet division principles during network teaching demos

Features

CIDR results all at once: Mask, network address, broadcast address, and host range all included
Convenient for planning and verification: Suitable for network segment allocation, device configuration, and teaching demos
Reduce manual conversion: Avoid errors when manually calculating bit counts and address boundaries
Results intuitive and copyable: Easy to continue writing into docs, configuration tables, or network design plans

How to Use

1.Enter IPv4 CIDR format (e.g., 192.168.0.1/24)
2.Tool automatically calculates and displays network address, broadcast address, subnet mask, and other info
3.View usable host range, address block size, and binary mask
4.Copy JSON format results for network configuration docs or device setup

FAQ

What results can a subnet calculator provide?

Common results include subnet mask, network address, broadcast address, usable host range, and host count. Enough for most network segment planning scenarios.

Is it suitable for ops and network teaching?

Yes. Whether for daily network segment allocation or explaining CIDR and broadcast address concepts to newcomers, it quickly provides intuitive results.

Why is manual subnet calculation error-prone?

Because it requires handling binary bit counts, mask conversion, and address boundaries simultaneously. Using a tool significantly reduces manual conversion errors.

Can it be used with IP conversion and network range expansion tools?

Yes. Subnet calculation, address conversion, and range expansion typically belong to the same network planning workflow. Using them together is more efficient.