Cheatography
https://cheatography.com
Class ACIDR | Addresses | Wildcard | Mask | /8 | 16777216 | 0.255.255.255 | 255.0.0.0 | /9 | 8388608 | 0.127.255.255 | 255.128.0.0 | /10 | 4194304 | 0.63.255.255 | 255.192.0.0 | /11 | 2097152 | 0.31.255.255 | 255.224.0.0 | /12 | 1048576 | 0.15.255.255 | 255.240.0.0 | /13 | 524288 | 0.7.255.255 | 255.248.0.0 | /14 | 262144 | 0.3.255.255 | 255.252.0.0 | /15 | 131072 | 0.1.255.255 | 255.254.0.0 |
Class BCIDR | Addresses | Wildcard | Mask | /16 | 65536 | 0.0.255.255 | 255.255.0.0 | /17 | 32768 | 0.0.127.255 | 255.255.128.0 | /18 | 16384 | 0.0.63.255 | 255.255.192.0 | /19 | 8192 | 0.0.31.255 | 255.255.224.0 | /20 | 4096 | 0.0.15.255 | 255.255.240.0 | /21 | 2048 | 0.0.7.255 | 255.255.248.0 | /22 | 1024 | 0.0.3.255 | 255.255.252.0 | /23 | 512 | 0.0.1.255 | 255.255.254.0 |
| | Class CCIDR | Addresses | Wildcard | Mask | /24 | 256 | 0.0.0.255 | 255.255.255.0 | /25 | 128 | 0.0.0.127 | 255.255.255.128 | /26 | 64 | 0.0.0.63 | 255.255.255.192 | /27 | 32 | 0.0.0.31 | 255.255.255.224 | /28 | 16 | 0.0.0.15 | 255.255.255.240 | /29 | 8 | 0.0.0.7 | 255.255.255.248 | /30 | 4 | 0.0.0.3 | 255.255.255.252 |
Reserved RangesBeginning | End | 10.0.0.0 | 10.255.255.255 | 127.0.0.0 | 127.255.255.255 | 172.16.0.0 | 172.31.255.255 | 192.168.0.0 | 192.168.255.255 |
Classful RangesA | 0.0.0.0 | 127.255.255.255 | B | 128.0.0.0 | 191.255.255.255 | C | 192.0.0.0 | 223.255.255.255 |
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Mistake in Class C
/29 has 8 addresses, not 18.
Whoops, thanks. Fixed. :)
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