====== Private IP ranges ======
^ RFC1918 name  ^ IP address range             ^ number of addresses                                                                                                                                                                                           ^ classful description            ^ largest CIDR block (subnet mask)  ^ host id size  ^ mask bits  ^
| 24-bit block  | 10.0.0.0-10.255.255.255      | 16777216                                                                                                                                                                                                      | single class A network          | 10.0.0.0/8 (255.0.0.0)            | 24 bits       | 8 bits     |
| 20-bit block  | 172.16.0.0-172.31.255.255    | 1048576                                                                                                                                                                                                       | 16 contigous class B networks   | 172.16.0.0/12 (255.240.0.0)       | 20 bits       | 12 bits    |
| 16-bit block  | 192.168.0.0-192.168.255.255  | 65536                                                                                                                                                                                                         | 256 contigous class C networks  | 192.168.0.0/16 (255.255.0.0)      | 16 bits       | 16 bits    |
| APIPA         | 169.254.0.0-169.254.255.255  | Automatic Private IP Addressing is a feature on Microsoft operating systems to automatically assign itself an IP address within this range if a Dynamic Host Configuration Protocol server is not available.                                                                                                 |||||
| Localhost     | 127.0.0.1-127.255.255.255    | Network testing addresses (also referred to as loop-back addresses)                                                                                                                                                                                                                                          |||||