Subnet / CIDR Calculator

Calculate network address, broadcast address, subnet mask, usable hosts, and more from CIDR notation.

CIDR Notation

Addressing

Network address

192.168.1.0

Broadcast address

192.168.1.255

Subnet mask

255.255.255.0

Wildcard mask

0.0.0.255

First usable host

192.168.1.1

Last usable host

192.168.1.254

Statistics

Prefix length

/24

IP class

C

Total IPs

256

Usable hosts

254

Binary

IP address11000000.10101000.00000001.00000000

Subnet mask11111111.11111111.11111111.00000000

About Subnet Calculator / CIDR Calculator Online

Free online subnet calculator. Enter CIDR notation to get network address, broadcast, subnet mask, usable hosts, binary representation and more.

How to use Subnet / CIDR Calc

1Enter an IP address with CIDR prefix in the input (e.g., 192.168.1.0/24).
2Network address, broadcast, subnet mask and host range appear instantly.
3View the binary representation to understand the bit breakdown.
4Click example presets to explore common subnets.

Frequently Asked Questions

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About Subnet Calculator / CIDR Calculator Online

Free online subnet calculator. Enter CIDR notation to get network address, broadcast, subnet mask, usable hosts, binary representation and more.

How to use Subnet / CIDR Calc

1Enter an IP address with CIDR prefix in the input (e.g., 192.168.1.0/24).
2Network address, broadcast, subnet mask and host range appear instantly.
3View the binary representation to understand the bit breakdown.
4Click example presets to explore common subnets.

Frequently Asked Questions

Related Tools

HTTP Request Builder

Convert cURL ↔ fetch ↔ axios.

HTTP Status Codes

Reference for all HTTP status codes.

Format, validate, and minify JSON.

Generate UUIDs, ObjectIds, NanoIDs.