What is CIDR notation and why is it important?

CIDR (Classless Inter-Domain Routing) notation is a method for representing IP address ranges. It's important because it helps network administrators efficiently allocate IP addresses and create subnets, replacing the older classful networking system.

How can this CIDR calculator help with virtual network planning?

This calculator helps you determine exact IP ranges, subnet masks, and available host addresses for your network segments. It's particularly useful when planning cloud infrastructure or configuring virtual networks in platforms like AWS, Azure, or GCP.

What is subnetting and why would I need it?

Subnetting is the practice of dividing a network into smaller, manageable segments. It improves network security, reduces network traffic, and helps in organizing different departments or services within your infrastructure.

How do I calculate the number of available hosts in a subnet?

Our calculator automatically determines this by using the formula 2^(32-prefix) - 2, where prefix is the CIDR notation number. The -2 accounts for the network and broadcast addresses that cannot be used for hosts.

What's the difference between network address and broadcast address?

The network address is the first address in a subnet and identifies the network itself. The broadcast address is the last address in the subnet and is used to send packets to all hosts in that network. Neither can be assigned to hosts.

How can I plan my virtual network subnets efficiently?

Use this calculator to plan your subnet sizes based on your needs. Consider future growth, allocate larger subnets for areas that will need more IPs, and ensure your subnets don't overlap. The calculator helps verify your planning by showing exact ranges and available hosts.

CIDR IP Range Calculator

Calculate IP ranges and subnet information quickly and easily

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CIDR IP Range Calculator

Subnet Calculator