| CIDR/Class | 17/B | 18/C | 19/D | 20/E | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | CIDR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Increment | 128 | 64 | 32 | 16 | 8 | 4 | 2 | 1 | 128 | 64 | 32 | 16 | 8 | 4 | 2 | 1 | Wildcard Mask + 1 |
| Subnet Mask (Class start) | 128 | 192 | 224 | 240 | 248 | 252 | 254 | 255 | 128 | 192 | 224 | 240 | 248 | 252 | 254 | 255 | Subnet Mask |
| Hosts | 32766 | 16382 | 8190 | 4094 | 2046 | 1022 | 510 | 254 | 126 | 62 | 30 | 14 | 6 | 2 | 2† | 1†† | Hosts |
| Networks (B) | 2 | 4 | 8 | 16 | 32 | 64 | 128 | 256 | 512 | 1024 | 2048 | 4096 | 8192 | 16384 | 32768† | 65536†† | Networks (B) |
| Networks (C) | 2 | 4 | 8 | 16 | 32 | 64 | 128† | 256†† | Networks (C) |