IPV4网络掩码对照表

内网IP地址按如下计算 192.168.1.0 或 192.168.0.0 或 192.0.0.0
序号	子网掩码	掩码位	主机数	子网数
1	255.255.255.255	32	0	256
2	255.255.255.254	31	0	128
3	255.255.255.252	30	2	64
4	255.255.255.248	29	6	32
5	255.255.255.240	28	14	16
6	255.255.255.224	27	30	8
7	255.255.255.192	26	62	4
8	255.255.255.128	25	126	2
9	255.255.255.0	24	254	1
10	255.255.254.0	23
11	255.255.252.0	22
12	255.255.248.0	21
13	255.255.240.0	20
14	255.255.224.0	19
15	255.255.192.0	18
16	255.255.128.0	17
17	255.255.0.0	16
18	255.254.0.0	15
19	255.252.0.0	14
20	255.248.0.0	13
21	255.240.0.0	12
22	255.224.0.0	11
23	255.192.0.0	10
24	255.128.0.0	9
25	255.0.0.0	8
26	254.0.0.0	7
27	252.0.0.0	6
28	248.0.0.0	5
29	240.0.0.0	4
30	224.0.0.0	3
31	192.0.0.0	2
32	128.0.0.0	1
33	0.0.0.0	0

 

内网IP地址以 0.0.0.0 计算
序号	子网掩码	掩码位	主机数	子网数
1	255.255.255.255	32	0	16,777,216
2	255.255.255.254	31	0	8,388,608
3	255.255.255.252	30	2	4,194,304
4	255.255.255.248	29	6	2,097,152
5	255.255.255.240	28	14	1,048,576
6	255.255.255.224	27	30	524,288
7	255.255.255.192	26	62	262,144
8	255.255.255.128	25	126	131,072
9	255.255.255.0	24	254	65,536
10	255.255.254.0	23	510	32,768
11	255.255.252.0	22	1022	16,384
12	255.255.248.0	21	2046	8,192
13	255.255.240.0	20	4094	4,096
14	255.255.224.0	19	8190	2,048
15	255.255.192.0	18	16,382	1,024
16	255.255.128.0	17	32,766	512
17	255.255.0.0	16	65,534	256
18	255.254.0.0	15	131,070	128
19	255.252.0.0	14	262,142	64
20	255.248.0.0	13	524,286	32
21	255.240.0.0	12	1,048,574	16
22	255.224.0.0	11	2,097,150	8
23	255.192.0.0	10	4,194,302	4
24	255.128.0.0	9	8,388,606	2
25	255.0.0.0	8	16,777,214	1
26	254.0.0.0	7
27	252.0.0.0	6
28	248.0.0.0	5
29	240.0.0.0	4
30	224.0.0.0	3
31	192.0.0.0	2
32	128.0.0.0	1
33	0.0.0.0	0