A question about dynamic IP addresses?

Question

ok,so i wuz talkin to someone over chat,and i saw that person wuz using a dynamic ip address at home,bcoz it had a format like 59.95.X.Y,in wich the X and Y were allwayz changing.
if that person goes to another town,like 300 km away,and talks to me in chat from there,from an internet cafe,is it posible to have the same dynamic IP format 59.95.X.Y?can the same format be used by that internet company for many regions,and cities,in a country,or every major city has a certain dynamic ip format?thnx

Answer 1

59.95.x.y doesn't mean it's dynamic any more than any other address range, yes if they are 300km away they can still have the same format because there's nothing about your IP that specifically has anything to do with your location.

Answer 2

Each ISP is issued a series of public IP addresses so the ISP can link with its customer base.

If you have a dynamic IP address, you will notice that it is very common for the first 2 and in some cases the first 3 sets of numbers remain the same with the last 2 or last 1 number sets altering each time the IP address is refreshed.

The ISP decides how it wishes to dispatch IP addresses. They may have the first 2 sets fixed and those do not change. They may select to have a range of the 3rd set for one locality, and another range for another locality as it fits their purpose. Unless you know the method by which the ISP doles out the IP addresses it is anyone's guess on what you will see. In fact it really does not matter.

If you go to another ISP it is very likely that the first and second sets of numbers are markedly different, not necessarily because of the diffrence in distance but because of the difference in ISP.

Answer 3

The allocation of ip addresses can be independant of location. But it is not independent of provider. Also, depending on the size of the network ip address range, you could have 2 separate providers falling in 59.95.x.y (i.e. 1 provider could be 59.95.3.y and another could be 59.95.4.y- this is a possibility).

Usually, most providers have a large address range to provide for numerous users.

There are different types of network classes (A-E). A different class means a different size. But just because a provider has a certain sized network, doesn't mean they haven't split things into subnets and distributed those network addresses to other providers.

So, to answer your question, yes, it is possible.

Here's a link with a brief summary on ip address and networks: http://www.erg.abdn.ac.uk/users/gorry/course/inet-pages/ip-address.html

The Data Analyst - http://www.squidoo.com/thedataanalyst

Answer 4

It depends on the network type, for example the networks starting from 1.x.y.z untill 127.x.y.z are class A networks, while networks 128.0.x.y until 191.255.x.y are class B networks, and networks starting from 192.0.0.x untill 223.255.255.x are class C ... each network has it's own network part and host part, in the previous networks, the x,y and z are the part of the host ... so the only thing that let's you know if the user is from that network, is the network part of the IP ... but still most networks allow dynamic IP allocation to the users, not fixed ...

Answer 5

ISPs rent ranges of numbers. For example, your friends ISP may have leased all the numbers from 59.95.001.000 to 59.95.001.200. As long as he is using that ISP, he will get in number in that range.

If he goes to a different location with a different ISP, he will get a number from their range instead. If the new location, even though 300km away, uses the same ISP, he could still get a number within the the 59.95.xxx.xxx range.

It is not physical location, but rather ISP which decides what number you getting.