Private Address Ranges, IPv4
Private IPv4 addresses are addresses set aside by the IANA (Internet Assigned Numbers Authority) for use within networks
that will not directly communicate or not be seen by the internet. These private addresses cannot be used on the Internet or be
used to communicate with the Internet. ISP’s filter out and delete packets using private IP addresses. Any organization that
uses private IP addresses on devices that communicate with the internet must use a device that performs Network Address
Translation.
Anyone can us private addresses and they are not required to seek permission to use them. Again, networks using private IP
addresses cannot communicate directly with the internet.
There are three blocks of addresses that are set aside by IANA for use in private internets and are not publicly routable on the
global internet:
Private Class A Range: 10.0.0.0 - 10.255.255.255
Private Class B Range: 172.16.0.0 - 172.31.255.255
Private Class C Range: 192.168.0.0 - 192.168.255.255
It is important to note that only
some
of the 172.xx.xx.xx and the 192.xx.xx.xx address ranges are designated for private use.
The remaining addresses are public and can be routable via the global Internet.
More information regarding private addresses can be found at http://www.iana.org and https://www.arin.net.
Product Notes:
Distributed by:
14
HDIP-8000 Manual V1.0
