Typical Subnets for IPv4


Prefix sizeNetwork maskUsable hosts per subnet
/1128.0.0.02,147,483,646
/2192.0.0.01,073,741,822
/3224.0.0.0536,870,910
/4240.0.0.0268,435,454
/5248.0.0.0134,217,726
/6252.0.0.067,108,862
/7254.0.0.033,554,430
Class A
/8255.0.0.016,777,214
/9255.128.0.08,388,606
/10255.192.0.04,194,302
/11255.224.0.02,097,150
/12255.240.0.01,048,574
/13255.248.0.0524,286
/14255.252.0.0262,142
/15255.254.0.0131,070
Class B
/16255.255.0.065,534
/17255.255.128.032,766
/18255.255.192.016,382
/19255.255.224.08,190
/20255.255.240.04,094
/21255.255.248.02,046
/22255.255.252.01,022
/23255.255.254.0510
Class C
/24255.255.255.0254
/25255.255.255.128126
/26255.255.255.19262
/27255.255.255.22430
/28255.255.255.24014
/29255.255.255.2486
/30255.255.255.2522
/31255.255.255.2540
/32255.255.255.2550

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