IP Subnet Calculator (IPv4)
Enter an IP address with CIDR notation to instantly calculate the subnet mask, number of hosts, network address, broadcast address, and available IP range. IPv4 supported. A handy tool for system administrators and DevOps engineers.
What Is a Subnet and How Does It Work?
A subnet is a logically segmented part of an IP network that improves routing and security. Every IP address consists of two parts: the network and the host. The subnet mask defines how many bits belong to the network.
For example, 192.168.1.0/24 means the first 24 bits are the network portion, and the remaining 8 bits are for hosts.
- 📡 Network address: first IP in the subnet
- 🔁 Broadcast address: last IP, used for broadcasting
- 👥 Available hosts: all IPs between network and broadcast