Understanding IP class range.

[Kevin Fries]

IP addresses follow classes out of tradition.  Take the first octet, and
convert it to binary.  If it starts with a:

1, its a class E, which was never actually used.
01, is class D, and is for multicast broadcasts.
001 is class C, or /24, 255.255.256.0
0001 is class B, or /16, 255.255.0.0
And 0000 is class A, or /8, 255.0.0.0

Hope this helps.

Kevin
On Aug 30, 2015 9:47 PM, "Keith Smith" <techlists at phpcoderusa.com> wrote:

>
> Hi,
>
> Occasionally I see something like 192.168.0.0/24. The reference I am
> looking at now refers to the 24 as the class range. Is it actually the
> subnet?
>
> How do I convert this into the two IP's that make up the range?
>
> Thanks in advance for your help!!
> Keith
>
>
> --
> Keith Smith
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