IPv4

Address Ranges

Range	Purpose	RFC	IPs
`0.0.0.0/8`	“This Network”	791, 1122	16,777,216
`10.0.0.0/8`	Private Use	1918	16,777,216
`127.0.0.0/8`	Loopback	1122	16,777,216
`172.16.0.0/12`	Private Use	1918	1,048,576
`169.254.0.0/16`	Automatic Addressing	3927	65,536
`192.0.2.0/24`	Documentation (TEST-NET-1)	5737	256
`192.168.0.0/16`	Private Use	1918	65,536
`198.51.100.0/24`	Documentation (TEST-NET-2)	5737	256
`203.0.113.0/24`	Documentation (TEST-NET-3)	5737	256
`224.0.0.0/4`	Multicast (Class D)	5771	268,435,456
`240.0.0.0/4`	Reserved / Experimental (Class E)	1122	268,435,456

This Network

The 0.0.0.0 address literally means “when an app requests connectivity to 0.0.0.0, bind to every interface running IP and make it work”.