7             6          5              4             3            2                1                      0
128           64         32             16            8            4                2                      1
                                   Network        Subnet        Host        No. of        No. of    Magic No. 
No   P   Class      IP Address                                                                                       Subnet No.       Subnet Broadcast       IP range
                                     bits          bits         bits       subnets        hosts     256‐Prefix
                 10.180.10.18
1                255.192.0.0
                 10.200.10.18
2                255.224.0.0
                 10.100.18.18
3                255.240.0.0
                 10.100.18.18
4                255.248.0.0
                 10.150.200.200
5                255.252.0.0
                 10.150.200.200
6                255.254.0.0
                 10.220.100.18
7                255.255.0.0
                 10.220.100.18
8                255.255.128.0
                 172.31.100.100
9                255.255.190.0
                 172.31.100.100
10               255.255.224.0
                 172.31.200.10
11               255.255.240.0
                 172.31.200.10
12               255.255.248.0
                 172.31.50.50
13               255.255.252.0
                 172.31.50.50
14               255.255.254.0
                 172.31.140.14
15               255.255.255.0
                 172.31.140.14
16               255.255.255.128
                 192.168.15.150
17               255.255.255.192
                 192.168.15.150
18               255.255.255.224
                 192.168.100.100
19               255.255.255.240
                 192.168.100.100
20               255.255.255.248
                                              7             6          5              4             3            2                1                      0
                                              128           64         32             16            8            4                2                      1
                                   Network        Subnet        Host        No. of        No. of    Magic No. 
No   P   Class      IP Address                                                                                       Subnet No.       Subnet Broadcast       IP range
                                     bits          bits         bits       subnets        hosts     256‐Prefix
                 192.168.15.230
21               255.255.255.252
                 10.1.1.1
22               255.248.0.0
                 172.16.1.200 
23               255.255.240.0
                 172.16.0.200 
24               255.255.255.192
                 10.1.1.1
25               255.0.0.0