With an IPv4 IP address, there are five classes of available IP ranges:
Class A, Class B, Class C, Class D and Class E, while only A, B, and C are commonly used. Each class allows for a range of valid IP addresses, shown in the following table.
|
Class |
Address range |
Supports |
|
Class A |
1.0.0.1 to 126.255.255.254 |
Supports 16 million hosts on each of 127
networks. |
|
Class B |
128.1.0.1 to 191.255.255.254 |
Supports 65,000 hosts on each of 16,000
networks. |
|
Class C |
192.0.1.1 to 223.255.254.254 |
Supports 254 hosts on each of 2 million
networks. |
|
Class D |
224.0.0.0 to 239.255.255.255 |
Reserved for multicast groups. |
|
Class E |
240.0.0.0 to 254.255.255.254 |
Reserved for future use, or research and
development purposes. |
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