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The class B address range
The class B network has two high-order bits set to 10, includes ranges from 128.0.0.0 to 192.0.0.0, has a 16-bit prefix for network IDs (/16), and has a subnet mask that is equivalent to 255.255.0.0. Class B has a maximum of 16,384 network IDs and 65,536 possible host addresses.
The following screenshot shows the structure of a class B address:
