CIDR Calculator | SkyConverterTools

Calculate network details, subnet masks, and usable IP ranges for any CIDR notation. Perfect for network administrators and developers.

CIDR Calculator

Enter a CIDR notation and the number of usable IPs to display.

💡 Developer Tip: CIDR (Classless Inter-Domain Routing) notation is used to represent IP addresses and their associated routing prefix. It's commonly used in networking to define subnets.

About CIDR Notation

About CIDR Notation

CIDR (Classless Inter-Domain Routing) is a method for allocating IP addresses and IP routing. It replaces the previous system based on Class A, Class B and Class C networks.

CIDR notation is a compact representation of an IP address and its associated network mask. It's written as the IP address, a slash ('/'), and a decimal number representing the number of leading 1 bits in the network 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, which means the first 24 bits are the network address and the remaining 8 bits are for host addresses.

How to Use

  1. Enter CIDR: Type a CIDR notation in the input field (e.g., 192.168.1.0/24).
  2. Set IP Count: Specify how many usable IP addresses you want to display.
  3. Calculate: Click the "Calculate" button to see network details and IP addresses.
  4. Copy Results: Use the "Copy All" button to copy all IP addresses to your clipboard.
  5. Download: Use the "Download CSV" button to save the IP list as a CSV file.
  6. Quick Actions: Use the sample data to test the tool or clear inputs with a single click.

Pro Tip: For larger networks, you might want to increase the number of IPs to display to see more addresses in the list.