IPv4 Subnet / CIDR Calculator: quick start guide

Everything you need for a first successful run: what to paste in, which option actually matters, and how to read the result.

Input IPv4 Subnet / CIDR Calculator Output Runs 100% in your browser — your data never leaves your device.
IPv4 Subnet / CIDR Calculator — Input → Output. Runs 100% in your browser — your data never leaves your device.

How to use

  1. Open the tool and paste your input into the left pane.
  2. Set only the options your task actually needs — the defaults are correct for most inputs.
  3. Read the result in the right pane; it updates as you type.
  4. Use Copy to take the result, or Download to save it as a file.
How to use · IPv4 Subnet / CIDR Calculator 1 Paste your data intothe input box (or loadthe example). 2 Configure the optionsto match your targetformat or scenario. 3 Copy, download orinspect the output —it updates live as youtype.
How to use — 3

Examples

Full subnet breakdown.

Input

192.168.10.0/24

Output — Results

CIDR: 192.168.10.0/24

Network address:   192.168.10.0
Broadcast address: 192.168.10.255
Subnet mask:       255.255.255.0
Wildcard:          0.0.0.255

First usable host: 192.168.10.1
Last usable host:  192.168.10.254
Usable hosts:      254
Total addresses:   256

Binary mask: 11111111.11111111.11111111.00000000
Hex mask: 0xFFFFFF00

Run

Description

Network address, broadcast, wildcard, mask and host range from any CIDR.

IPv4 Subnet / CIDR Calculator → · How to use → · IP Tools →

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Related guides

CIDR and Subnet Masks Explained with Worked Examples