Last Byte | What | Why |
Addresses | Happens | |
to Them | ||
0 | invalid | first subnet address |
1-30 | valid | hosts on first subnet |
31 | invalid | broadcast address of first subnet |
32 | invalid | first |
224 | invalid | eighth subnet address |
225-254 | valid | hosts for eighth subnet |
255 | invalid | broadcast for eighth subnet |