Real-time CIDR, IP addressing, subnet mask, and network analysis tool
This professional subnet calculator performs real-time calculations for IP subnetting, CIDR notation, network addressing, and provides comprehensive network analysis. Enter an IP address and subnet mask or CIDR notation to begin.
This subnet calculator is a powerful tool for network administrators, IT professionals, and students to analyze and calculate IP subnets in real-time. Understanding subnetting is essential for efficient network design and IP address management.
1. Enter your IP address (e.g., 192.168.1.1) in the IP Address field.
2. Specify your subnet mask (e.g., 255.255.255.0) or CIDR notation (e.g., /24).
3. The calculator instantly displays network address, broadcast address, usable host range, and more.
4. Use the slider to adjust subnet bits and see how it affects available hosts.
5. Enter required hosts to find the optimal subnet size for your network.
CIDR (Classless Inter-Domain Routing) notation is a compact representation of an IP address and its associated routing prefix. The notation is written as the IP address, a slash ('/'), and the prefix length (number of leading 1 bits in the subnet mask). For example, 192.168.1.0/24 represents the IP address 192.168.1.0 with a subnet mask of 255.255.255.0.
Our network calculator helps with various networking tasks:
Use the "Required Hosts" field to automatically calculate the smallest possible subnet that can accommodate your devices, minimizing IP address waste and optimizing your network design.