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IPv4 Subnet Calculator

IPv4 Subnet Calculator is a free online calculator that helps you calculate network/broadcast addresses, host range, mask, wildcard mask, host counts, and IP class from a CIDR. IPv4 Subnet Calculator uses 1 input field, returns 12 output values, and runs in your browser on the device.

Key facts

Inputs
1 field: CIDR
Outputs
12 values: CIDR, Network address, Broadcast address, First usable host, Last usable host, Total addresses, Usable hosts, Subnet mask, Wildcard mask, Subnet mask (binary), IP class, and IP type
Runtime
your browser on the device
Mode
Calculator
Privacy
Files and text stay in the browser session.
Cost
$0, no account required

How to use IPv4 Subnet Calculator

  1. 1

    Paste or fill in the input

    Enter your text or values into the input fields on the page.

  2. 2

    Run the utility

    Click Compute to run the utility in your browser and review the result.

  3. 3

    Copy the output

    Copy the output value you need from the result panel.

IPv4 Subnet Calculator details

First, enter CIDR in IPv4 Subnet Calculator. Next, review CIDR, Network address, Broadcast address, First usable host, Last usable host, Total addresses, Usable hosts, Subnet mask, Wildcard mask, Subnet mask (binary), IP class, and IP type. Additionally, IPv4 Subnet Calculator uses 1 input field and 12 output blocks so the result is easy to scan and copy.

Drop in any IPv4 CIDR like 192.168.1.0/24 or 10.0.0.0/8 and get the full subnet breakdown: network address, broadcast address, usable host range, subnet mask in dotted-decimal and binary, wildcard mask (for ACLs), total and usable host counts, IP class, and whether the range is private (RFC 1918), loopback, link-local, multicast, CGNAT or public. Computation is pure bitwise on 32-bit unsigned integers; runs entirely in your browser.

Common searches

  • subnet calculator
  • cidr calculator
  • ipv4 subnet calculator
  • subnet mask calculator
  • network and broadcast address calculator
  • host range calculator

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Frequently asked

What is IPv4 Subnet Calculator?

IPv4 Subnet Calculator is a free online calculator that helps you calculate network/broadcast addresses, host range, mask, wildcard mask, host counts, and IP class from a CIDR. IPv4 Subnet Calculator uses 1 input field, returns 12 output values, and runs in your browser on the device.

What inputs and outputs does IPv4 Subnet Calculator use?

IPv4 Subnet Calculator uses 1 input field: CIDR. IPv4 Subnet Calculator returns 12 output values: CIDR, Network address, Broadcast address, First usable host, Last usable host, Total addresses, Usable hosts, Subnet mask, Wildcard mask, Subnet mask (binary), IP class, and IP type.

Do my files and data stay private?

Yes. IPv4 Subnet Calculator runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.

How do I use IPv4 Subnet Calculator?

Open IPv4 Subnet Calculator, paste or fill in the input fields, and the result updates instantly. IPv4 Subnet Calculator runs in your browser with no upload and no waiting.

Which browsers does IPv4 Subnet Calculator support?

Any modern browser works in Chrome, Firefox, Safari, and Edge on desktop and mobile. IPv4 Subnet Calculator uses standard web APIs and does not require any plugin, extension, or sign-up.