TABLE 2: Valid Subnet Addresses
Subnet Address	Additional Bits Required	Maximum Number of Subnets	Maximum Number of Hosts-- C network	Maximum Number of Hosts-- B network	Maximum Number of Hosts-- A network
0	0	0	254	65,534	16,777,214
192	2	2	62	16,382	4,194,302
224	3	6	30	8,190	2,097,150
240	4	14	14	4,094	1,048,574
248	5	30	6	2,046	524,286
252	6	62	2	1,022	262,142
254	7	126	Invalid	510	131,070
255	8	254	Invalid	254	65,534