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Subnet Mask to CIDR Converter

Convert subnet mask notation to CIDR. Get CIDR notation from subnet mask.

Subnet Mask

Results

Enter a subnet mask to convert

How to Use

  1. 1

    Enter subnet mask (e.g., 255.255.255.0)

  2. 2

    Click 'Convert' to get CIDR

  3. 3

    See binary representation and host count