Network Subnet Calculator Tool
Calculate network information from an IP address and subnet mask/CIDR notation
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Start Free TrialHow to Use the Network Subnet Calculator
Enter an IP address and either a subnet mask (e.g., 255.255.255.0) or CIDR notation (e.g., /24), then click "Calculate Subnet" to get detailed network information including subnet range, broadcast address, and more.
Why Subnet Calculations Matter to Network Professionals
Proper subnet planning is essential for network segmentation, security, and efficient IP address utilization. This calculator helps you quickly determine key network parameters without manual binary calculations.
Use Cases for Network Administration
This tool is perfect for:
- Planning network infrastructure and IP address allocation
- Troubleshooting network connectivity issues
- Configuring routers, switches, and firewalls with correct subnet information
- Designing VLANs and network segments
- Understanding IP address ranges for access control lists (ACLs)
Connection to Cloud Infrastructure
Cloud networks require careful IP planning to ensure smooth operations. Kloudbean's managed cloud infrastructure supports optimal network design, allowing you to implement the subnetting strategies you determine with this calculator.
Frequently Asked Questions
Q. What is CIDR notation?
CIDR (Classless Inter-Domain Routing) notation is a compact method to specify IP addresses and their routing prefix. It's written as an IP address followed by a forward slash and the prefix length (e.g., 192.168.1.0/24).
Q. How do I determine the optimal subnet size?
Choose a subnet size that accommodates your required number of hosts while minimizing wasted IP addresses. Smaller subnets (/28, /29) are good for minimal host counts, while larger subnets (/16, /20) accommodate more devices.
Q. What is the difference between network address and broadcast address?
The network address (first address in a subnet) identifies the network segment itself, while the broadcast address (last address) is used to send packets to all hosts within that subnet. Neither can be assigned to hosts.
Q. Why can't I use the network or broadcast address for hosts?
The network address identifies the subnet itself, and the broadcast address is reserved for sending packets to all devices on that subnet. Using either for host addressing would cause network conflicts.
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