Is it possible

[EZ22]

For two computers who share the same dial up service to have the same IP? Meaning, at different locations, but the same ISP.....and have the same IP address?

Thanks.

[EvilRick]

It is possible, but highly unlikely. When you login to your dial-up, it's like using DHCP, you get an IP out of a pool. Most times you'll get the same one(s) all the time.

Another PC could login at another location and get an IP you used to have, but it wouldn't get the same one at the same time. That isn't possible. Each PC has to have a different IP address or neither one of them would work.

[johnnyis42]

from your post....

"Meaning, at different locations, but the same ISP.....and have the same IP address?"

yes, it is possible for you to see this as the case. this happens with certain national isp's who use a proxy server for all their client connections, and also with cell phone providers with certain implimentations of their web access through cellular data devices.

the ide here is that the remote connection is made to a central server, which turns around and hands out an ip address to the dial up user on their internal nework. this is very similar to the home internet routers that use network address translation to allow multiple users to use the same ip address for internet connectivity. however, in this case the end user never actually "sees" their gateway. in this case the proxy the isp uses is the only network information the user lets the world see. inside the isp, however, the user sees a gateway that is on their same network segment, and sees the rest of the internet just like they were on a global ip address, which they may actually posess. however, chances are they don't posess a global ip address because often times these kinds of internet access implimentations are used for their cost saving abilities, in that the isp can use a handfull of ip addesses to serve thousands and thousands of users.

i know this goes on because when i was in misawa, japan, the isp serving dsl to misawa air force base used just this kind of method to cut costs and infrastructure management and overhead costs. people on the inside of the dsl network only had one of 2 ip addresses to the rest of the world, depending on which side of base they lived. also, from inside the network you could not run any kind of server aplication, game or otherwise, and usually could not do any peer-to-peer file transfers.

this is only one example, and it was definitely a proxy server, which alkso used a network address translation implimentation one layer behind the proxy.

i have my suspicions about AOL also. i have seen their dial up users' ip addresses all originate from california, regardless of where the user was geographically. now, there may be more points of entry to the internet for AOL dial up users, however in my experience this is the only place i have seen pop up in the limmited ammount that i have looked.

short answer, yes, it is possible for you to see 2 computers on the net with the same ip[ address, but in 2 totally different locations if they have the same service provider.