Number of Bits in Mask used for subnet	Mask	Number of subnets	Number of Hosts	Number of Bits for Hosts
2	255.192.0.0	2	4,194,302	22
3	255.224.0.0	6	2,097,150	21
4	255.240.0.0	14	1,048,574	20
5	255.248.0.0	30	524,286	19
6	255.252.0.0	62	262,142	18
7	255.254.0.0	126	131,070	17
8	255.255.0.0	254	65,534	16
9	255.255.128.0	510	32,766	15
10	255.255.192.0	1,022	16,382	14
11	255.255.224.0	2,046	8,190	13
12	255.255.240.0	4,094	4,094	12
13	255.255.248.0	8,190	2,046	11
14	255.255.252.0	16,382	1,022	10
15	255.255.254.0	32,766	510	9
16	255.255.255.0	65,534	254	8
17	255.255.255.125	131,070	126	7
18	255.255.255.192	262,142	62	6
19	255.255.255.224	524,286	30	5
20	255.255.255.240	1,048,574	14	4
21	255.255.255.248	2,097,150	6	3
22	255.255.255.252	4,194,302	2	2