CIDR Calculator

Calculate CIDR notation and ranges

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CIDR Reference Table

CIDR Subnet Mask Addresses Hosts
/32255.255.255.25511
/31255.255.255.25422
/30255.255.255.25242
/29255.255.255.24886
/28255.255.255.2401614
/27255.255.255.2243230
/26255.255.255.1926462
/25255.255.255.128128126
/24255.255.255.0256254
/23255.255.254.0512510
/22255.255.252.01,0241,022
/21255.255.248.02,0482,046
/20255.255.240.04,0964,094
/16255.255.0.065,53665,534
/12255.240.0.01,048,5761,048,574
/8255.0.0.016,777,21616,777,214
/00.0.0.04,294,967,2964,294,967,294

About CIDR Calculator

Calculate CIDR notation and ranges

Use this free online network tools tool to work faster without installing extra software. The interface is built for quick input, clear output, and straightforward results on desktop and mobile devices.

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