Cheatography
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Masks1st | 2nd | 3rd | 4th | /1 | /9 | /17 | /25 | /2 | /10 | /18 | /26 | /3 | /11 | /19 | /27 | /4 | /12 | /20 | /28 | /5 | /13 | /21 | /29 | /6 | /14 | /22 | /30 | /7 | /15 | /23 | /31 | /8 | /16 | /24 | /32 |
Example | 1st | 2nd | 3rd | Address | 165 | 245 | 12 | Mask | 255 | 255 | 255 | Network | 165 | 245 | 12 | Broadcast | 165 | 245 | 12 | First IP | 165 | 245 | 12 | Last IP | 165 | 245 | 12 |
Subnet 165.245.12.88/26
| | Mask Cont.Subnet Mask | Networks | Addresses | 128 | 2 | 128 | 192 | 4 | 64 | 224 | 8 | 32 | 240 | 16 | 16 | 248 | 32 | 8 | 252 | 64 | 4 | 254 | 128 | 2 | 255 | 256 | 1 |
| | Powers of 22^1 | 2 | 2^10 | 1,024 | 2^2 | 4 | 2^11 | 2,048 | 2^3 | 8 | 2^12 | 4,096 | 2^4 | 16 | 2^13 | 8,192 | 2^5 | 32 | 2^14 | 16,384 | 2^6 | 64 | 2^15 | 32,768 | 2^7 | 128 | 2^16 | 65,536 | 2^8 | 256 | 2^17 | 131,072 | 2^9 | 512 | 2^18 | 262,144 |
| | Multiples of 80 | 64 | 128 | 192 | 8 | 72 | 136 | 200 | 16 | 80 | 144 | 208 | 24 | 88 | 152 | 216 | 32 | 96 | 160 | 224 | 40 | 104 | 168 | 232 | 48 | 112 | 176 | 240 | 56 | 120 | 184 | 248 | 64 | 128 | 192 | 256 |
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