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2024年7月18日发(作者:)
子网掩码对照表
子网掩码掩码位总
IP
数可用主机数
255.255.255.255
255.255.255.254
255.255.255.252
255.255.255.248
255.255.255.240
255.255.255.224
255.255.255.192
255.255.255.128
255.255.255.0
255.255.254.0
255.255.252.0
255.255.248.0
255.255.240.0
255.255.224.0
255.255.192.0
255.255.128.0
255.255.0.0
255.254.0.0
255.252.0.0
255.248.0.0
255.240.0.0
255.224.0.0
255.192.0.0
255.128.0.0
255.0.0.0
254.0.0.0
252.0.0.0
248.0.0.0
240.0.0.0
224.0.0.0
192.0.0.0
128.0.0.0
0.0.0.0
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
1
2
4
8
16
32
64
128
256
512
1024
2048
4096
8192
16384
32768
65536
131072
262144
524288
1048576
2097152
4194304
8388608
16777216
33554432
67108864
134217728
268435456
536870912
1073741824
2147483648
4294967296
1
0
2
6
14
30
62
126
254
510
1022
2046
4094
8190
16382
32766
65534
131070
262142
524286
1048574
2097150
4194302
8388606
16777214
33554430
67108862
134217726
268435454
536870910
1073741822
2147483646
4294967294
C
类网段数量
1/256 th
1/128 th
1/64 th
1/32 th
1/16 th
1/8 th
1/4 th
l half
1
2
4
8
16
32
64
128
256
512
1024
2048
4096
8192
16384
32768
655536
131072
262144
1048576
2097152
4194304
83388608
16777216
33554432
反掩码对照表
反掩码掩码位
0.0.0.032
0.0.0.131
0.0.0.330
0.0.0.729
0.0.0.1528
0.0.0.3127
0.0.0.6326
0.0.0.12725
0.0.0.25524
0.0.1.25523
0.0.3.25522
0.0.7.25521
0.0.15.25520
0.0.31.25519
0.0.63.25518
0.0.127.25517
0.0.255.25516
0.1.255.25515
0.3.255.25514
0.7.255.25513
0.15.255.25512
0.31.255.25511
0.63.255.25510
0.127.255.2559
0.255.255.2558
1.255.255.2557
3.255.255.2556
7.255.255.2555
15.255.255.2554
31.255.255.2553
63.255.255.2552
127.255.255.2551
255.255.255.2550
对照表
正掩码
255.255.255.255
255.255.255.254
255.255.255.252
255.255.255.248
255.255.255.240
255.255.255.224
255.255.255.192
255.255.255.128
255.255.255.0
255.255.254.0
255.255.252.0
255.255.248.0
255.255.240.0
255.255.224.0
255.255.192.0
255.255.128.0
255.255.0.0
255.254.0.0
255.252.0.0
255.248.0.0
255.240.0.0
255.224.0.0
255.192.0.0
255.128.0.0
255.0.0.0
254.0.0.0
252.0.0.0
248.0.0.0
240.0.0.0
224.0.0.0
192.0.0.0
128.0.0.0
0.0.0.0
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