Interactive Subnet Calculator

Master IP subnetting with real-time calculations, binary breakdowns, and visual network analysis

IP Address

Subnet Mask

Quick Examples:

Network Information

Network Address:
Broadcast Address:
First Usable IP:
Last Usable IP:

Subnet Details

Subnet Mask:
CIDR Notation:
Total Addresses:
Usable Hosts:

Binary Analysis

Octet

Binary Representation

■ Network Bits | ■ Host Bits

Subnetting Context

Subnet Navigation

Previous Subnet:

Current Subnet

Next Subnet:

Learn More About Subnetting

This calculator helps you understand IP subnetting by showing:

Network vs. Host Bits: How the subnet mask divides IP addresses
Address Ranges: Valid IP ranges within each subnet
Binary Mathematics: The underlying binary calculations
Practical Context: Real-world usage scenarios

Complete Subnetting Guide More Network Tools