what is exactly RANGE means here?

[as12john_A]

I know the net id of these are not the same, so the two following are not in the same network.Is this right?

165.12.64.0/19

169.12.31.230/19

My friend told me the two ip above are in the range of the following or vise versa!!,but I am very confused about what THE RANGE means here!

165.12.0.0./19

Thanks in advanced

[Seb Rupik · Accepted solution]

Hi there,

You are correct those two subnets do not overlap.

The only subnet that would contain those address ranges would be 10.12.0.0 /17

I suppose by RANGE you friend is talking about sequential contiguous blocks, ie:

165.12.0.0 /19

165.12.32.0 /19

165.12.64.0 /19

...

169.12.96.0 /19

...but that is not a term in this context I am familiar with.

cheers,

Seb.

[Jerome BERTHIER]

Hi

165.12.64.0/19 refers to :

Network range        - 165.12.64.0 - 165.12.95.255
Usable range (if you exclude network and broadcast address)        - 165.12.64.1 - 165.12.95.254

169.12.31.230/19 refers to :

Network range        - 169.12.0.0 - 169.12.31.255
Usable range (if you exclude network and broadcast address)        - 169.12.0.1 - 169.12.31.254

165.12.0.0/19 refers to :

Network range        - 165.12.0.0 - 165.12.31.255
Usable range (if you exclude network and broadcast address)       - 165.12.0.1 - 165.12.31.254

It is wrong to say that 169.12.31.230/19 and 165.12.0.0/19 are both in the same range of IP.

The fisrt supernet where both are included is 160.0.0.0/4.

Take a look on what is CIDR :

https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing

Regards,

Jérôme

[as12john_A]

Thanks.But, how to know that what is the meaning of the range of a network IP?

for instance:165.12.0.0/19
as far as I know, the following network has several ranges, and every ranges are in one network.
Would you please if I am right show me how that works?
Thanks

[Jerome BERTHIER]

Just take a look on what is CIDR :

https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing

You can split 165.12.0.0/19 in a lot of network until mask /32 :

You can get two networks /20, four networks /21, eight networks /22 and so on until 8192 networks /32...

Regards