Private and Public IP Addresses Explained
Posted by Admin on March 11th, 2007
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What is Public IP address
Public IP Addresses (also known as Static IP Addresses) are IP addresses that are visible to the public.Because these ip addresses are public, they allow other people to know about and access your computer, like a Web server.In some cases, you do not want people to access your computer or you want to restrict certain individuals from accessing your computer or server.
Private IP Addresses
What is Private IP address
These addresses can be used on a private network, but they’re not routable through the public Internet. This not only creates a measure of much-needed security, but it also conveniently saves valuable IP address space.
Current Private IP addresses as follows
Class A
10.0.0.0 through 10.255.255.255
Class B
172.16.0.0 through 172.31.255.255
Class C
192.168.0.0 through 192.168.255.255
April 15th, 2007 at 8:54 pm
This is perhaps not a really vital distinction but a Public IP Address is NOT automatically a Static IP Address.
On my home DSL connection, for example, I have a Dynamic IP Address – it is assigned by my ISP and will sometimes change (hence Dynamic) but it is the IP address visible to the world (Public) for all computers on my network.
Within my network, of course, Class C addresses are used and information is routed to the appropriate machine using those addresses by my router.
I would say that the Public IP Address is the one broadcast or transmitted with request packets so that information may be routed accurately to your access point, router, or stand-alone computer/workstation; or broadcast so that your access point, router, or stand-alone computer/workstation may be located by other machines/services on the public network or internet.
May 10th, 2007 at 7:27 am
Public IP address can be static or dynamic, depending on what you have applied with your ISP.
Most of the case a static public IP is used if the purpose is to have a fixed IP address (Web Server, FTP Server and etc.).
The private IP address above is true and for standard use your private network must follow these IP addressing.
**************************************
Class A
10.0.0.0 through 10.255.255.255
Class B
172.16.0.0 through 172.31.255.255
Class C
192.168.0.0 through 192.168.255.255
***************************************
All IP address except the above mentioned is for public use (From Class A to Class E).
September 28th, 2007 at 9:52 am
Public ip address are unique n used by web servers like yahoo.com , google.com
they r paid ip address
Private ip address r unique within a LAN
they r used for general purpose n are free
The valid private ip address are
Class A 10.0.0.1 to 10.255.255.254
Class B 172.16.0.1 to 172.31.255.254
Class C 192.168.0.1 to 192.168.255.254
Rest are public
June 24th, 2008 at 8:50 pm
i have public ip for third party.how can i log on in that pc? pls explain me.
Best regards
Munir
July 9th, 2008 at 8:56 pm
Actually my question is. i wanna logon to other computer remotely i have all that computer details
for example= lan ip and public ip. pls write me in details
best regards
Munir
July 22nd, 2008 at 5:34 am
i want to know about the procedure of connectivity by static ip
May 10th, 2009 at 5:17 pm
Sir, With reference to Charles M.Kozierok’s TCP/IP guide i concluded that private ip address is correct as given above. Please give one correct info as these are sensitive details(in my point of view).
May 14th, 2009 at 8:12 am
dear. sir
can u teach more from ip range to me..
please…
with your plasure
May 14th, 2009 at 6:52 pm
sir thanks for publishing my comment though not useful.
June 9th, 2009 at 6:12 pm
In my opinion I think most of you have skipped over a very important detail. Private IP addresses are not Internet route-able and therefore cannot be used as public addresses. This is why home and business type routers all support what is called NAT, network address translation. The outside interface (public facing) generally has a Public IP given to you by your ISP (Internet Service Provider). This IP address is not required to be public and can be private but there has to be NAT somewhere before actual Internet access is established.
September 27th, 2009 at 12:32 pm
sir please let me know about the public ip address and how they are purchased from isp and from where isp purchased these ip address.