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