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New Member

public class A addresses

Hi all, Can anyone tell me the private CLASS A addresses and the public class A addresses ?

7 REPLIES

Re: public class A addresses

Hi Carl,

Class A ip address range:

1.0.0.1 to 126.255.255.254

Private Adress for Class A

10.0.0.0 - 10.255.255.255 (10/8 prefix)

Rest all the ip addresses are public.

HTH,Please rate if it does.

-amit singh

New Member

Re: public class A addresses

does that mean Class A ip address range:

1.0.0.1 to 126.255.255.254 are public ?

Gold

Re: public class A addresses

1.0.0.1 to 126.255.255.254 are public

There are also IANA reserved addresses and this IPs shouldn't be on public internet (1.0.0.0 /24; 2.0.0.0/24 etc.)

check following table

http://ip-lookup.net/documents/Internet-Protocol-v4-Address-Space

So public class are IPs 1.0.0.1 to 126.255.255.254

EXCLUDING address marked as IANA - Reserved from table above

M.

Bronze

Re: public class A addresses

Yes the range 1.0.0.1 to 126.255.255.254 are public

expect the 10.0.0.0 to 10.255.255.254 range are reserved for private network which are not routable on internet.

HTH

Rajini

Re: public class A addresses

Many of the non-private Class A addresses are reserved for use by the United States Department of Defense, which invented TCP/IP.

Trivia buffs, feel free to rate this post.

New Member

Re: public class A addresses

Is 127.0.0.0 class A, I know its a loopback address but I always see 0-127 class A, Is this right ?

Re: public class A addresses

Hi,

As originally defined in RFC 790 (now obsolete) class A addresses were 000.rrr.rrr.rrr through 127.rrr.rrr.rrr with 0 and 127 being reserved.

A lot has changed since then and even the term "Class A" is now obsolete. (Worth reading RFC 4632 for the history)

HTH

Andrew.

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