classful network 

Statements about this table:
class c have more lead bit than class a
the size of class d and class e rest bit field be not define
the end address of all classful network end in 255
class c have more network than class a
class c have fewer initial bit than class a
the size of rest bit field class d and class e be define
the final address of all nuncs class network end in 255
class c have fewer network than class a
class
leading bits
size of network number bit field
size of rest bit field
number of networks
class a
0
8
24
128 (2 7 )
class b
10
16
16
16384 (2 14 )
class c
110
24
8
2097152 (2 21 )
class d ( multicast )
1110
not defined
not defined
not defined
class e (reserved)
1111
not defined
not defined
not defined
class
addresses per network
start address
end address
class a
16777216 (2 24 )
0.0.0.0
127.255.255.255
class b
65536 (2 16 )
128.0.0.0
191.255.255.255
class c
256 (2 8 )
192.0.0.0
223.255.255.255
class d ( multicast )
not defined
224.0.0.0
239.255.255.255
class e (reserved)
not defined
240.0.0.0
255.255.255.255