How come when I change IP only the last 6 digits are changed?

For example if my IP were: xxx.xxx.xxx.xxx how come only the last 6 xxx's change? cause lets say my ip was 69.69.69.69 when I change it by using the cmd way it changes it to 69.69.123.12 or whatever... how come the first 6 don't change?How come when I change IP only the last 6 digits are changed?
69 is a class A and should allow you to change the last 3 octets. But is you look at the subnet. you will see it is set to 255.255.0.0 This will only allow you the change the last 2 octets.



-tcwHow come when I change IP only the last 6 digits are changed?
Ultimately the allocation of IP addresses is controlled by ICANN, with the regional responsibilities given over to different regional and local bodies.



Because there is a limited range of IP addresses and there must not be conflicts (ie. you IP address *must* be unique on any given network), IP addresses are tightly controlled.



Your ISP will have been given a certain block of IP addresses that they can use, in your example in the range 69.69.xxx.xxx.
Because those digits are allocated to your ISP (internet company)



As a result you can tell who a person gets their internet from if you know their IP address

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