Private IP
Address Range
Public IP addresses are addresses that are valid as nodes on
the Internet. They can be resolved and routed across the Internet from one
point to another.
Unlike public IP, private IP addresses are not valid on the Internet.
Three range of private IP addresses has been selected for the three network class.
Class A network, 10.0.0.0 - 10.255.255.255 (10/8 prefix) range (For big network that requires a huge pool of 16 million private IP addresses)
Unlike public IP, private IP addresses are not valid on the Internet.
Three range of private IP addresses has been selected for the three network class.
Class A network, 10.0.0.0 - 10.255.255.255 (10/8 prefix) range (For big network that requires a huge pool of 16 million private IP addresses)
Class B network,
172.16.0.0 - 172.31.255.255 (172.16/12 prefix) range (For medium-sized network
that requires 65000 private IP addresses)
Class C network, 192.168.0.0 - 192.168.255.255 (192.168/16 prefix) range (Commonly used IP range on smaller network for easier addressing of 254 IP addresses. May not necessarily be smaller network but network managed in smaller blocks.)
*Beside these, there is Microsoft's 169.254.0.0 range of default IP addresses that are allocated to systems when they are unable to obtain address from a DHCP server.
Class C network, 192.168.0.0 - 192.168.255.255 (192.168/16 prefix) range (Commonly used IP range on smaller network for easier addressing of 254 IP addresses. May not necessarily be smaller network but network managed in smaller blocks.)
*Beside these, there is Microsoft's 169.254.0.0 range of default IP addresses that are allocated to systems when they are unable to obtain address from a DHCP server.
Class
|
Start Address
|
End Address
|
Description
|
0.0.0.0 /8
|
0.255.255.255
|
Reserved.
|
|
A
|
10.0.0.0 /8
|
10.255.255.255
|
Class A private
address block.
|
127.0.0.0 /8
|
127.255.255.255
|
Loopback address
block.
|
|
128.0.0.0 /16
|
128.0.255.255
|
Reserved.
|
|
169.254.0.0 /16
|
169.254.255.255
|
*Class B private
address block reserved for automatic private address allocation.
|
|
B
|
172.16.0.0 /16
|
172.31.255.255
|
Class B private address
blocks.
|
191.255.0.0
|
191.255.255.255
|
Reserved.
|
|
192.0.0.0/24
|
192.0.0.255
|
Reserved.
|
|
C
|
192.168.0.0 /24
|
192.168.255.255
|
Class C private
address blocks.
|
223.255.255.0
|
223.255.255.255
|
Reserved.
|
TIP: If ever required
to use the DNS other than your ISP, Configuring your network settings to use
Google Public DNS
In most cases, the IP addresses used by your
ISP's domain name servers are automatically set by your ISP via the Dynamic
Host Configuration Protocol (DHCP). To use Google Public DNS, you need to explicitly
change the DNS settings in your operating system or device to use the Google
Public DNS IP addresses.
