Does my I.P. address change when I'm on different networks? Like if I'm on my home wireless network and say... Starbucks' wireless network?
Almost always on wireless networks you will not be assigned a real internet address but a local one. There are ranges of network numbers reserved for local networks that are not routed on the internet. These ranges are 192.168.x.x, 172.16-31.x.x, and 10.x.x.x. There is actually one more local network used in Windows networking but I can't remember the network number off the top of my head. In general addresses are assigned serially so whatever local address you get when you log in will be the first available one at that particular time so yes your local address will generally be different very time.
The reason for the local IP address is because if every device connected to the internet had its own real IP address we would have run out long ago. Devices on local networks are assigned local addresses and access the internet through a router that uses Network Address Translation or NAT so that all the devices on that local network share a single or few real IP address. Your real address will also change when you are on different networks; when you are home you will use one of your ISP's real IP addresses, when you are at Starbucks you will be using one of Starbucks or their ISP's IP addresses.
After you log into a wireless network bring up a command window (assuming Windows) and type "ipconfig" to see what your machine thinks your IP address is. I'll bet it will be an address in 192.168.x.x, 172.16-32.x.x or 10.x.x.x. Now go to a website like http://whatsmyip.org/ and you will see what your real IP address in on the Internet.
If you have a WAP plugged directly into a broadband modem you might actually be assigned a real address at home. If this is your setup I'd recommend you get a router to put between your modem and WAP even if you don't need extra ports. You see in addition to allowing more devices NAT provides another security layer for your device since it makes it less reachable from the internet.
why would (on gmail) at the bottom read an ip address of one place (overseas) hubby is in the military and when you pull up the details, it says the location is US and in california? which is it? I was looking at our gmail we get on and was wondering if I could find out if he is coming home :)! the ip was the same, however, when I did the search on the net (put the ip in the search engine, it said djubouti) but the recent activity logg had the same ip and said California...
Yes. The IP Address belongs to the person providing internet access. Its different for every provider of internet access. You just use it temporarily to access the internet.
Here's the thing. Every computer needs an ID to identify itself on the internet. The IP address assigned to you is this ID. Typically, your IP address can change every time you start up your computer. In practice if you remain with the same provider, it may not change that frequently.
For your own safety it's better to use VPN. Frauds would seek for your personal data, government is also collecting our private info. There are tools that can make you invisible while on the internet. like this one, for example.
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Yes, Your IP address changes for every network which you are accessing from. You can ensure this by having an IP lookup at