Does IP Subnet Calculator cost anything or require an account?

No. IP Subnet Calculator is completely free with no usage caps, subscriptions, or sign-up forms — supported by unobtrusive ads, and usable for personal and commercial work alike.

Can I use IP Subnet Calculator on a phone or offline?

Yes. The layout adapts to phones and tablets, and because the logic ships as static client-side code, IP Subnet Calculator keeps working on intermittent connections once the page has loaded.

How does IP Subnet Calculator work without uploading my data?

IP Subnet Calculator runs entirely inside your browser's sandbox: the page loads once, and every operation after that executes on your own device's CPU. No input, file, or result is transmitted to any server — you can even watch the network tab stay silent while you use it.

IP Subnet Calculator

Q: What exactly does IP Subnet Calculator do?

IPv4 CIDR ranges, masks and hosts Enter an IPv4 address and CIDR prefix (or dotted mask) to get the network address, broadcast, usable host range, wildcard mask, total hosts and binary representation.

IPv4 CIDR ranges, masks and hosts

Free Private No uploads

IP subnet calculator

IPv4 address

Prefix length (CIDR)

0–32 · netmask 255.255.255.0

Network /24

Network address

192.168.1.0/24

Netmask

255.255.255.0

Wildcard mask

0.0.0.255

Broadcast

192.168.1.255

First host

192.168.1.1

Last host

192.168.1.254

Total addresses

256

Usable hosts

254

IP class

Address in binary

11000000.10101000.00000001.00001010

Netmask in binary

11111111.11111111.11111111.00000000

/24 is the classic home network (256 addresses, 254 usable); /30 is used for point-to-point links (2 usable). For /31 (RFC 3021) both addresses are usable, and /32 denotes a single host. Private ranges: 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16.

100% Private & In-Browser

Processed locally using client-side JavaScript. Your files and data never touch any server.

Instant & Unlimited

No registration, no waiting queues, and no limits on file conversions or generations.

Tool Overview & Guide

What is IP Subnet Calculator?

Enter an IPv4 address and CIDR prefix (or dotted mask) to get the network address, broadcast, usable host range, wildcard mask, total hosts and binary representation.

Step-by-Step Instructions

How to use IP Subnet Calculator

Open IP Subnet Calculator in any modern web browser on your computer, tablet, or smartphone.

Type, paste, or configure your input data and parameters in the IP Subnet Calculator interface.

The tool processes your data in real time directly on your device using modern browser standards, DOM APIs, and network protocol specifications.

Copy your generated result to your clipboard, preview the output, or save your file with a single click.

Key Capabilities

Cross-Platform Compatibility — works the same across Windows, macOS, Linux, iOS, and Android.
No Account, No Email, No Watermarks — open the page and start working immediately.
Developer-Friendly Output — results are formatted for direct paste into code, configs, or terminals.
IPv4 CIDR ranges, masks and hosts

Common Use Cases

Full-stack developers, UI/UX engineers, DevOps teams, and technical leads who need to streamline daily development workflows and eliminate manual boilerplate tasks without installing software.
Enter an IPv4 address and CIDR prefix (or dotted mask) to get the network address, broadcast, usable host range, wildcard mask, total hosts and binary representation.
Handling private or confidential material that should not be uploaded to third-party cloud services.
Running a quick one-off task — once loaded, most tools keep working even if the connection drops.

Clear Answers

Frequently Asked Questions

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