IP Subnet Calculator Online Free | CIDR, Mask, Broadcast, Hosts

IP Subnet Calculator

Calculate network, broadcast, mask, host range, and usable hosts for IPv4 CIDR blocks.

Utility workflow
Interactive workspace
Utility

Calculate network, broadcast, mask, host range, and usable hosts for IPv4 CIDR blocks.

The live editor, upload controls, and browser-only processing load after the app bootstraps on the client.

IP Subnet Calculator - Overview

IP Subnet Calculator helps you inspect IPv4 networks quickly with the fields engineers actually need when working with CIDR blocks and host allocation.

How to Use

  1. Enter an IPv4 address and prefix, such as 192.168.1.34/24
  2. Review the calculated mask, network, broadcast, and host range
  3. Copy the summary for tickets, docs, or infrastructure notes

Features

  • CIDR parsing and validation
  • Network, broadcast, and subnet mask output
  • Usable host counts and ranges
  • Binary view for IP, mask, and network

FAQs

Does this support IPv4 or IPv6?

This version focuses on IPv4 subnet calculations and CIDR ranges.

Can I use this for infrastructure planning and firewall rules?

Yes, it is useful for understanding masks, ranges, and host capacity when working on networking tasks.

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Keywords: ip subnet calculator, cidr calculator, subnet mask calculator, broadcast address calculator