20
DT-ATSC-QAM-8V2 Manual
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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 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: 1
92.168.0.0 - 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.
