I'll say it's a FAQ - Local IP address

I'll say it's a FAQ - Local IP address

Post by Peter Jon » Wed, 26 Apr 1995 04:00:00



Why, when you think "Hey, I better store that article somewhere for when I
need it" do you _never_ do it?  Well, I didn't...  Sigh.

Gang, what's the A, B and C class "non-Internet" IP address ranges?  This
time, promise, I'll right it down right away... Hmmmmph....

<FX: Sounds of thanatos hitting self over head with large stick>

-- Peter
--
Drealm Conference System -- (+44) 181 568 4305 (V.FC)
The home of drealmBBS -------- six lines -- live chat

 
 
 

I'll say it's a FAQ - Local IP address

Post by Alan Skell » Thu, 27 Apr 1995 04:00:00


: Gang, what's the A, B and C class "non-Internet" IP address ranges?  This
: time, promise, I'll right it down right away... Hmmmmph....

A=1.0.0.0 => 127.0.0.0
B=128.0.0.0 => 191.255.0.0
C=192.0.0.0 => 223.255.255.0
D=224=>254 reserved

--
| Alan Skelley | Dept of Computing Science, University of Alberta, Canada    |



 
 
 

I'll say it's a FAQ - Local IP address

Post by Mark Cudwor » Thu, 27 Apr 1995 04:00:00


: Why, when you think "Hey, I better store that article somewhere for when I
: need it" do you _never_ do it?  Well, I didn't...  Sigh.

Fortunately, I still have a post saved with this info...

: Gang, what's the A, B and C class "non-Internet" IP address ranges?  This
: time, promise, I'll right it down right away... Hmmmmph....

-----------------------------------------------------------------------------
RFC1597: Address Allocation for Private Internets by Y. Rekhter, B.
Moskowitz, D. Karrenberg and G. de Groot

Section 3:

   The Internet Assigned Numbers Authority (IANA) has reserved the
   following three blocks of the IP address space for private networks:

        10.0.0.0        -   10.255.255.255
        172.16.0.0      -   172.31.255.255
        192.168.0.0     -   192.168.255.255

   We will refer to the first block as "24-bit block", the second as
   "20-bit block, and to the third as "16-bit" block.  Note that the
   first block is nothing but a single class A network number, while the
   second block is a set of 16 contiguous class B network numbers, and
   third block is a set of 255 contiguous class C network numbers.

There are additional comments on INternet Namespace Management in RFC
1744 by G. Huston which you might find of interest as well.

(Both of therse are available from ftp.internic.net:/rfc/rfc####.txt)


------------------------------------------------------------------------------

Hope this helps.

--------------------------------------------------------
        Mark Cudworth

        http://www.indy.net/~cudworth/index.html
--------------------------------------------------------

 
 
 

I'll say it's a FAQ - Local IP address

Post by Peter Jon » Fri, 28 Apr 1995 04:00:00


: Fortunately, I still have a post saved with this info...
<grin>

: Hope this helps.
Great.

And thanks for e-mail, too, folks.  I now have RFC1597 safely filed.  (All I
have to do now is update all _three_ (!!!! <grin>) machines with safe IP
addresses...).

-- Peter
--
Drealm Conference System -- (+44) 181 568 4305 (V.FC)
The home of drealmBBS -------- six lines -- live chat

 
 
 

I'll say it's a FAQ - Local IP address

Post by Peter Wal » Fri, 28 Apr 1995 04:00:00





> : Gang, what's the A, B and C class "non-Internet" IP address ranges?  This
> : time, promise, I'll right it down right away... Hmmmmph....

> A=1.0.0.0 => 127.0.0.0
> B=128.0.0.0 => 191.255.0.0
> C=192.0.0.0 => 223.255.255.0
> D=224=>254 reserved

> --
> | Alan Skelley | Dept of Computing Science, University of Alberta, Canada    |



That's the entire address space... What he was asking for was the
"private" address space as detailed in RFC1597. They are:

------
3. Private Address Space

   The Internet Assigned Numbers Authority (IANA) has reserved the
   following three blocks of the IP address space for private networks:

        10.0.0.0        -   10.255.255.255
        172.16.0.0      -   172.31.255.255
        192.168.0.0     -   192.168.255.255

   We will refer to the first block as "24-bit block", the second as
   "20-bit block, and to the third as "16-bit" block.  Note that the
   first block is nothing but a single class A network number, while the
   second block is a set of 16 contiguous class B network numbers, and
   third block is a set of 255 contiguous class C network numbers.

-----

--------------------------------------------------------------
   Peter Walsh        o  \o/ \ / \o/ \o/#  o  \o/ <o  <o> \o/
 ---------------      |   |   |   |   |__ <|>  |   |>  |   |

--------------------------------------------------------------

 
 
 

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