Almost all of the selling routers using the IP address 192.168.1.1, 192.168.100.1, or 192.168.0.1 as its own management IP address, so why are these IP addresses lucky boy?
What is 192.168.1.1?
At the very beginning of the network history, the IPv4 address space is split into five parts, class A to class E. Excluding the special functions of class D space and class E space, the remaining three classes are A, B, and C. Address is the common IP address segment. Class A addresses have the largest capacity, which can accommodate 16,777,214 hosts, Class B addresses can accommodate 65534 hosts, and Class C addresses can accommodate 254 hosts.
In RFC 1918, Three IP address segments are reserved in the IPv4 address protocol as private addresses for internal use by organizations themselves. That is:
The private IP address in class A address space：10.0.0.0--10.255.255.255
The private IP address in class B address space：172.16.0.0--172.31.255.255
The private IP address in class C address space：192.168.0.0--192.168.255.255
No matter 192.168.1.1, 192.168.100.1, or 192.168.0.1 is belong to the space 192.168.0.0--192.168.255.255.
Why is 192.168.1.1 selected, not the 10.0.0.1, or 172.16.1.1?
The available hang on hosts for each private address space is as below:
Private address space | Available hosts |
Class A (10.0.0.0--10.255.255.255) | 167,77,214 |
Class B (172.16.0.0--172.31.255.255) | 1,048,574 |
Class C (192.168.0.0--192.168.255.255) | 254 |
As the table above shows, class A private address space and class B private address space has much more available hosts than needed in a home network. Therefore, when the local area network chooses to use private addresses, the private address segment is generally selected according to the actual number of hosts that need to be accommodated. Common LANs generally choose class C 192.168.0.0 as the address segment due to their small capacity. Some large enterprises need to use class B or even class A address segments as the address segment of the internal network.
Since there are fewer home networking devices, 192.168.0.0 will be used as the address segment usually. Also, for a long time, a large number of router brands use 192.168.1.1 as its devices management IP address, so the general public is left with the impression that the default router address is almost 192.168.1.1.
