IP Subnet Calculator
Calculate subnet information for IPv4 addresses including network address, broadcast address, and host range.
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