16~30位子网前缀信息
| 子网前缀 |
IP总数 |
子网掩码 |
C段个数 |
后24位 |
| /30 |
4 |
255.255.255.252 |
1/64 |
11111111 11111100 |
| /29 |
8 |
255.255.255.248 |
1/32 |
11111111 11111000 |
| /28 |
16 |
255.255.255.240 |
1/16 |
11111111 11110000 |
| /27 |
32 |
255.255.255.224 |
1/8 |
11111111 11100000 |
| /26 |
64 |
255.255.255.192 |
1/4 |
11111111 11000000 |
| /25 |
128 |
255.255.255.128 |
1/2 |
11111111 10000000 |
| /24 |
256 |
255.255.255.0 |
1 |
11111111 00000000 |
| /23 |
512 |
255.255.254.0 |
2 |
11111110 00000000 |
| /22 |
1024 |
255.255.252.0 |
4 |
11111100 00000000 |
| /21 |
2048 |
255.255.248.0 |
8 |
11111000 00000000 |
| /20 |
4096 |
255.255.240.0 |
16 |
11110000 00000000 |
| /19 |
8192 |
255.255.224.0 |
32 |
11100000 00000000 |
| /18 |
16384 |
255.255.192.0 |
64 |
11000000 00000000 |
| /17 |
32768 |
255.255.128.0 |
128 |
10000000 00000000 |
| /16 |
65536 |
255.255.0.0 |
256 |
00000000 00000000 |
