IP Subnet Mask Calculator

IP Subnet Mask Calculator

Calculate network subnets, CIDR allocations, broadcast addresses, usable IP ranges, and binary bit values instantly.

Subnet Settings
Subnet Details
IP Address: -
Subnet Mask: -
Network Address: -
Broadcast Address: -
Usable Host Range: -
First Usable IP: -
Last Usable IP: -
Total Usable Hosts: -
Wildcard Mask: -
IP Class: -
Binary IP Representation
IP:
Mask:
Net:
BCast:

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Features

Why Use IP Subnet Calculator?

Plan and divide your local networks with ease.

🌐

Full CIDR Integration

Supports standard class settings (A, B, C) and all CIDR prefixes ranging from /1 to /32.

🔢

Displays colorful binary representations of subnet mask bits so networking students can learn.

📐

Broadcast & Network Limits

Quickly calculate network addresses, wildcard masks, and broadcast IP parameters.

📝

Usable IP Listing

Directly identifies first usable, last usable, and range details to prevent addressing overlap.

⚡

Class Identifier

Automatically detects the IP address class range (Class A, B, C, D, or E) from your inputs.

🛡️

Zero Telemetry Queries

Runs completely locally using vanilla client JavaScript math. No data tracking or lookup logs.

Frequently Asked Questions

IP subnetting is the process of partitioning a single physical network into smaller logical network segments.

Classless Inter-Domain Routing (CIDR) is a method for allocating IP addresses and routing IP packets.

To broadcast data packets simultaneously to all active host nodes connected within the subnet.

It is calculated by setting the network bits to binary 1s and host bits to binary 0s based on the CIDR prefix.

An inverted subnet mask representation, commonly used in ACL routing configurations to filter packets.

This edition supports IPv4 subnet math, which represents the standard structure for local network designs.
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