CIDR to Subnet Mask

Convert a CIDR prefix to an IPv4 subnet mask.

Enter your values and run the tool.

About this cidr to subnet mask

Convert a CIDR prefix to an IPv4 subnet mask. Instant Solvers keeps the working tool at the top of the page so you can get the result immediately. Where possible, the calculation or transformation happens directly in your browser.

How to use it

  1. Enter the values or text requested above.
  2. Run the tool.
  3. Check the result and copy or download it if needed.