IP address class

Background:
The first byte of an IP address identifies which of the three network classes that address belongs to. The ranges for that first byte are as follows:

Class A: 1 to 126 (1.h.h.h to 126.h.h.h)
Class B: 128 to 191 (128.n.h.h to 191.n.h.h)
Class C: 192 to 223 (192.n.n.h to 223.n.n.h)

Where n represents the network address and h represents the host address.

They range from 224.0.0.1 to 239.255.255.255 are called Multicast addresses and are used to send packets to a group of hosts or routers.

Addresses in the range from 224.0.0.0 to 224.0.0.255 (224.0.0.0/24) are reserved Multicast addresses for the local subnet and are not forwarded by IP routers regardless of the Time to Live (TTL) in the IP header.

For a list of these reserved Multicast addresses check the following page
http://www.freesoft.org/CIE/RFC/1700/5.htm
(Eliminate spaces from the URL name when you cut and paste)

So to answer your question, 224.0.0.0 is not a class C address... it is a reserved Base Address for the use of routing protocols and other low-level topology discovery or maintenance protocols.

I hope you find this ... helpful.

Hi.
The answer to your question is NO. That address range is reserved for Class D, and is only used for preallocated for use with IP Multicast applications. Click here to learn more about IP address class breakdowns.

http://www-3.ibm.com/software/network/commserver/library/publications/csaix_60/dzgl1m41.htm

And link to here for information regarding IP Multicasting basics.

http://216.239.33.100/search?q=cache:SPbaMGbjeMYC:www.microsoft.com/usa/presentations/Multicast_Basics_(handout).doc+IP+Multicast+Address+Range&hl=en&ie=UTF-8

Regards,

Pete

No, Class C - 191-223

Mike Carney
mcs-connect.com