IP Subnet Calculator

Calculate subnet masks, network addresses, and IP ranges

Enter IP Address & Subnet

Enter an IPv4 address and subnet mask in CIDR notation

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Common Subnets

About Subnetting

🌐 Network Address

First address in the subnet, identifies the network

📡 Broadcast Address

Last address, used to send to all hosts

🖥️ Host Range

Usable addresses between network and broadcast

🔢 CIDR Notation

/24 means first 24 bits are network bits

Private IP Ranges

Class A: 10.0.0.0/8

10.0.0.0 - 10.255.255.255

Class B: 172.16.0.0/12

172.16.0.0 - 172.31.255.255

Class C: 192.168.0.0/16

192.168.0.0 - 192.168.255.255