What's my local IP address?
If you're not on the internet.
As a person who is, well, not on the internet and uses a public IP address, this is my answer for that question. When you're not on the internet, your internal network address is still the same as the one you get on the internet. In that case, your computer has a private IP address. When you are on the internet, you get an external IP address. You cannot have both at the same time unless you have your own network connection to the internet.
Now, your router will assign you an external IP address which is used to connect your computer to the internet. It's that IP address that will appear when you ask if your local IP address is something like 111.
To find out what your external IP address is, go to any site which provides external IP addresses, or ping your router from your computer. Once it responds to that ping, the external IP address of your router will be visible on that site.
When you are on the internet, the internet has assigned you an external IP address, so it's how you can get to the internet. When you are on the internet, the ISP provides you with an IP address; that's how they connect their network to the internet.
What is my private IP in Android?
I have created android app in which I need to get my private IP. I followed the answer from this question Get my private IP Address Using C# .NET. It is working fine and displays my public IP but not the private one.
The thing is my private IP is 172.16.20.18 (not public IP), but I dont know how to get it.
Thank you in advance. According to my knowledge, it is impossible to get private IP of a device. You might want to check out IP address of the device through other means like using the network API or accessing router page.
What is the local IP of my Android device?
If you have both the IP address of your device and its MAC address, then you can find out the location of the device based on its IP address.
However, this method is more accurate when you connect via WiFi, because the IP address usually changes on a wired connection. But, you may still want to know what is the local IP of a PC or an Android device if it has a mobile connection.
In that case, we'll consider the device as not available via WiFi, so the IP of the device may be a temporary IP address. It's the dynamic IP address that your Internet service provider sets up for the device, so it won't be the permanent IP address of that device. Moreover, a mobile device doesn't always use WiFi, so you may receive a cellular data IP address from your ISP that identifies the wireless cell network your mobile device is using, not the WiFi router (or access point).
There's more to know. In reality, the IP address of a WiFi-enabled device is the IP address of a router that connects to the Internet. Although a mobile device has no way to connect to the Internet without the help of a WiFi router, your home router provides a way to keep track of all your networked devices for easier management. However, a lot of routers come with built-in tools to see how many Internet devices are attached to the router, so if the only purpose of this tool is to tell us the IP address of your smartphone, it's already done. There are still other things to learn.
IP numbers. This number, represented by an eight-bit variable or variable range between 0 and 255, defines a location. More precisely, it defines a range. If you are familiar with the range IP addresses, a variable may also be called a class, type, subnet, network or host. These five terms represent three ranges of address spaces:
The first range, class A, occupies the numbers from 0 to 127;. The second range, class B, occupies the numbers from 128 to 191;. The third range, class C, occupies the numbers from 192 to 223. Every device on a LAN and connected to a router shares its IP address, even if they don't communicate over the Internet.
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