IP Subnet Calculator
Calculate subnet details including network address, broadcast, and usable host range.
IP Address & CIDR
What is the IP Subnet Calculator?
The IP Subnet Calculator is an advanced network engineering tool used to divide a large IP network into smaller, more efficient logical sub-networks. It is essential for IT admins designing LAN architectures, setting up routers, and preventing broadcast storms.
How It Works (Formula)
The tool performs bitwise logical AND operations on the binary representation of the IP address and the Subnet Mask. By analyzing the CIDR notation (e.g., /24), it calculates the exact Network Address, the Broadcast Address, and the range of usable host IPs.
$$ \text{Network Address} = \text{IP} \text{ AND } \text{Subnet Mask} $$
Binary bitwise operations isolate the network routing prefix.
How to Use It
Enter a valid IPv4 address and select your desired Subnet Mask or CIDR block size. The tool will instantly generate a full sub-netting chart showing your Network ID, Broadcast IP, First Usable Host, Last Usable Host, and total host capacity.