切分表
192.168.0.0/16 切成 /24
借 8 位，256 个子网，每个 254 台可用主机。
- 原网段
- 192.168.0.0/16
- 新掩码
- 255.255.255.0
- 子网个数
- 256（2 的 8 次方）
- 每个子网可用主机
- 254
- 块大小
- 1
算法
从 /16 到 /24，网络位多了 8 位，所以子网数是 2 的 8 次方，等于 256。主机位剩 8 位，每个子网 256 个地址，去掉网络地址和广播地址，剩 254 台。表里相邻两行的网络地址正好差一个块大小 1。
| # | 网络地址 | 首个可用 | 末个可用 | 广播地址 | 可用主机数 |
|---|---|---|---|---|---|
| 1 | 192.168.0.0/24 | 192.168.0.1 | 192.168.0.254 | 192.168.0.255 | 254 |
| 2 | 192.168.1.0/24 | 192.168.1.1 | 192.168.1.254 | 192.168.1.255 | 254 |
| 3 | 192.168.2.0/24 | 192.168.2.1 | 192.168.2.254 | 192.168.2.255 | 254 |
| 4 | 192.168.3.0/24 | 192.168.3.1 | 192.168.3.254 | 192.168.3.255 | 254 |
| 5 | 192.168.4.0/24 | 192.168.4.1 | 192.168.4.254 | 192.168.4.255 | 254 |
| 6 | 192.168.5.0/24 | 192.168.5.1 | 192.168.5.254 | 192.168.5.255 | 254 |
| 7 | 192.168.6.0/24 | 192.168.6.1 | 192.168.6.254 | 192.168.6.255 | 254 |
| 8 | 192.168.7.0/24 | 192.168.7.1 | 192.168.7.254 | 192.168.7.255 | 254 |
| 9 | 192.168.8.0/24 | 192.168.8.1 | 192.168.8.254 | 192.168.8.255 | 254 |
| 10 | 192.168.9.0/24 | 192.168.9.1 | 192.168.9.254 | 192.168.9.255 | 254 |
| 11 | 192.168.10.0/24 | 192.168.10.1 | 192.168.10.254 | 192.168.10.255 | 254 |
| 12 | 192.168.11.0/24 | 192.168.11.1 | 192.168.11.254 | 192.168.11.255 | 254 |
| 13 | 192.168.12.0/24 | 192.168.12.1 | 192.168.12.254 | 192.168.12.255 | 254 |
| 14 | 192.168.13.0/24 | 192.168.13.1 | 192.168.13.254 | 192.168.13.255 | 254 |
| 15 | 192.168.14.0/24 | 192.168.14.1 | 192.168.14.254 | 192.168.14.255 | 254 |
| 16 | 192.168.15.0/24 | 192.168.15.1 | 192.168.15.254 | 192.168.15.255 | 254 |
| 17 | 192.168.16.0/24 | 192.168.16.1 | 192.168.16.254 | 192.168.16.255 | 254 |
| 18 | 192.168.17.0/24 | 192.168.17.1 | 192.168.17.254 | 192.168.17.255 | 254 |
| 19 | 192.168.18.0/24 | 192.168.18.1 | 192.168.18.254 | 192.168.18.255 | 254 |
| 20 | 192.168.19.0/24 | 192.168.19.1 | 192.168.19.254 | 192.168.19.255 | 254 |
| 21 | 192.168.20.0/24 | 192.168.20.1 | 192.168.20.254 | 192.168.20.255 | 254 |
| 22 | 192.168.21.0/24 | 192.168.21.1 | 192.168.21.254 | 192.168.21.255 | 254 |
| 23 | 192.168.22.0/24 | 192.168.22.1 | 192.168.22.254 | 192.168.22.255 | 254 |
| 24 | 192.168.23.0/24 | 192.168.23.1 | 192.168.23.254 | 192.168.23.255 | 254 |
| 25 | 192.168.24.0/24 | 192.168.24.1 | 192.168.24.254 | 192.168.24.255 | 254 |
| 26 | 192.168.25.0/24 | 192.168.25.1 | 192.168.25.254 | 192.168.25.255 | 254 |
| 27 | 192.168.26.0/24 | 192.168.26.1 | 192.168.26.254 | 192.168.26.255 | 254 |
| 28 | 192.168.27.0/24 | 192.168.27.1 | 192.168.27.254 | 192.168.27.255 | 254 |
| 29 | 192.168.28.0/24 | 192.168.28.1 | 192.168.28.254 | 192.168.28.255 | 254 |
| 30 | 192.168.29.0/24 | 192.168.29.1 | 192.168.29.254 | 192.168.29.255 | 254 |
| 31 | 192.168.30.0/24 | 192.168.30.1 | 192.168.30.254 | 192.168.30.255 | 254 |
| 32 | 192.168.31.0/24 | 192.168.31.1 | 192.168.31.254 | 192.168.31.255 | 254 |
| 33 | 192.168.32.0/24 | 192.168.32.1 | 192.168.32.254 | 192.168.32.255 | 254 |
| 34 | 192.168.33.0/24 | 192.168.33.1 | 192.168.33.254 | 192.168.33.255 | 254 |
| 35 | 192.168.34.0/24 | 192.168.34.1 | 192.168.34.254 | 192.168.34.255 | 254 |
| 36 | 192.168.35.0/24 | 192.168.35.1 | 192.168.35.254 | 192.168.35.255 | 254 |
| 37 | 192.168.36.0/24 | 192.168.36.1 | 192.168.36.254 | 192.168.36.255 | 254 |
| 38 | 192.168.37.0/24 | 192.168.37.1 | 192.168.37.254 | 192.168.37.255 | 254 |
| 39 | 192.168.38.0/24 | 192.168.38.1 | 192.168.38.254 | 192.168.38.255 | 254 |
| 40 | 192.168.39.0/24 | 192.168.39.1 | 192.168.39.254 | 192.168.39.255 | 254 |
| 41 | 192.168.40.0/24 | 192.168.40.1 | 192.168.40.254 | 192.168.40.255 | 254 |
| 42 | 192.168.41.0/24 | 192.168.41.1 | 192.168.41.254 | 192.168.41.255 | 254 |
| 43 | 192.168.42.0/24 | 192.168.42.1 | 192.168.42.254 | 192.168.42.255 | 254 |
| 44 | 192.168.43.0/24 | 192.168.43.1 | 192.168.43.254 | 192.168.43.255 | 254 |
| 45 | 192.168.44.0/24 | 192.168.44.1 | 192.168.44.254 | 192.168.44.255 | 254 |
| 46 | 192.168.45.0/24 | 192.168.45.1 | 192.168.45.254 | 192.168.45.255 | 254 |
| 47 | 192.168.46.0/24 | 192.168.46.1 | 192.168.46.254 | 192.168.46.255 | 254 |
| 48 | 192.168.47.0/24 | 192.168.47.1 | 192.168.47.254 | 192.168.47.255 | 254 |
| 49 | 192.168.48.0/24 | 192.168.48.1 | 192.168.48.254 | 192.168.48.255 | 254 |
| 50 | 192.168.49.0/24 | 192.168.49.1 | 192.168.49.254 | 192.168.49.255 | 254 |
| 51 | 192.168.50.0/24 | 192.168.50.1 | 192.168.50.254 | 192.168.50.255 | 254 |
| 52 | 192.168.51.0/24 | 192.168.51.1 | 192.168.51.254 | 192.168.51.255 | 254 |
| 53 | 192.168.52.0/24 | 192.168.52.1 | 192.168.52.254 | 192.168.52.255 | 254 |
| 54 | 192.168.53.0/24 | 192.168.53.1 | 192.168.53.254 | 192.168.53.255 | 254 |
| 55 | 192.168.54.0/24 | 192.168.54.1 | 192.168.54.254 | 192.168.54.255 | 254 |
| 56 | 192.168.55.0/24 | 192.168.55.1 | 192.168.55.254 | 192.168.55.255 | 254 |
| 57 | 192.168.56.0/24 | 192.168.56.1 | 192.168.56.254 | 192.168.56.255 | 254 |
| 58 | 192.168.57.0/24 | 192.168.57.1 | 192.168.57.254 | 192.168.57.255 | 254 |
| 59 | 192.168.58.0/24 | 192.168.58.1 | 192.168.58.254 | 192.168.58.255 | 254 |
| 60 | 192.168.59.0/24 | 192.168.59.1 | 192.168.59.254 | 192.168.59.255 | 254 |
| 61 | 192.168.60.0/24 | 192.168.60.1 | 192.168.60.254 | 192.168.60.255 | 254 |
| 62 | 192.168.61.0/24 | 192.168.61.1 | 192.168.61.254 | 192.168.61.255 | 254 |
| 63 | 192.168.62.0/24 | 192.168.62.1 | 192.168.62.254 | 192.168.62.255 | 254 |
| 64 | 192.168.63.0/24 | 192.168.63.1 | 192.168.63.254 | 192.168.63.255 | 254 |
只列出前 64 个，共 256 个子网。规律不变：下一个网络地址等于上一个加块大小。