Query in class D range

When we say 224.0.0.0 through 239.255.255.255 range in class D reserved address for multicast do we mean 224.0.0.0/24 and 239.0.0.0/8 ?

Hello Kanakashriya

Actually, what we mean is all IP addresses that range from 224.0.0.0 to 239.255.255.255. This means:

224.0.0.0
224.0.0.1
224.0.0.2
224.0.0.3
224.0.0.4

224.0.0.254
224.0.0.255
224.0.1.0
224.0.1.1
224.0.1.2
224.0.1.3

225.0.0.1
225.0.0.2
225.0.0.3

238.255.255.254
238.255.255.255
239.0.0.0
239.0.0.1

239.255.255.253
239.255.255.254
239.255.255.255

That whole range can also be defined as 224.0.0.0/4 since for all addresses within this range, the first four bits remain the same. Note the values in binary:

11100000.00000000.00000000.00000000 is 224.0.0.0 in binary
11101111.11111111.11111111.11111111 is 239.255.255.255 in binary

I hope this has been helpful!

Laz