IP Address Classes & subnet Masks

Are there any dedicated Class A license ranges?

10 are PRIVATE IP's. 127 are all LOOPBACK IP's.

Are there any Dedicated Class B license ranges?

169.254 are for Apipa.. 172.16 thru 172.31 are PRIVATE IP's.

Are there any Dedicated Class C license ranges?

All of Class C are for PRIVATE IP's

Are there any Dedicated Class D license ranges?

All of Class D are for MULTICAST use. Example: streaming video to multiple hosts.

Class "A" Network ID Range

Class A Network ID's range from ZERO to 127, but ZERO is not used.

Class "B" Network ID Range

Class B Network ID's range from 128 through 191.

Class "C" Network ID Range

Class C Network ID's range from 192 thru 223

Class "D" Network ID Range

Class D Network ID's range from 224 thru 239

Class "A" Subnet Mask

Subnet mask is 255.0.0.0

Class "B" Subnet Mask

Subnet mask is 255.255.0.0 ..

Class "C" Subnet Mask

Subnet mask is 255.255.255.0

Class "D" Subnet Mask

Subnet mask is 255.255.255.255