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30 - 255.255.255.252
29 - 255.255.255.248
28 - 255.255.255.240
27 - 255.255.255.224
26 - 255.255.255.192
25 - 255.255.255.128
24 - 255.255.255.0
23 - 255.255.254.0
22 - 255.255.252.0
21 - 255.255.248.0
20 - 255.255.240.0
19 - 255.255.224.0
18 - 255.255.192.0
17 - 255.255.128.0
16 - 255.255.0.0
15 - 255.254.0.0
14 - 255.252.0.0
13 - 255.248.0.0
12 - 255.240.0.0
11 - 255.224.0.0
10 - 255.192.0.0
9 - 255.128.0.0
8 - 255.0.0.0
7 - 254.0.0.0
6 - 252.0.0.0
5 - 248.0.0.0
4 - 240.0.0.0
3 - 224.0.0.0
2 - 192.0.0.0
1 - 128.0.0.0
0 - 0.0.0.0
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