Example 2: In this example, we are going to use the ipinfo to get the clients IP address in a alert box.
Supported by Firefox and Edge. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute. See your article appearing on the GeeksforGeeks main page and help other Geeks. Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.
Subscribe to RSS
The callbacks receives a string the ip as first and unique parameter. You can see the previous snippet in action via JSFiddle:. The retrieven data object contains localization info like : country, city etc when available. Read more about ipinfo in the official website here. This service has no request limitations. You can use it in your project requesting to the API with the format parameter if you need and you're ready to go. Besides, you can create, in case you have your own server and you're able to work on it, create your own private service that returns the IP of the user with a server language like PHP,ASP.
The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information.
In node we would use require 'os' but we cannot do such thing on react native. Any ideas? Learn more. How can I get the device's ip on React Native? Ask Question. Asked 3 years, 8 months ago. Active 1 year, 4 months ago. Viewed 15k times. Active Oldest Votes. Chris Chris 8 8 silver badges 19 19 bronze badges. Actually if you take a look at the native Java code that retrieves this IP, it iterates through all interfaces and returns the last valid IP.
I mean his LAN address like I found several approaches that attempt to do this, but they either give me the external regular IP address, or they give I need the local network address. To get the private network address In short, if you're trying to grab someones private network address from outside that network you can't.
This is the exact html file I tried:. Hmm interesting, I tried on Firefox as well used Opera before and now it does give me something: You cannot get local internal ip address.
Don't know the code to do this though. If your windows user, open command prompt and type ipconfig This will NOT change anything because you haven't told it to. It simply shows your current ip configuration.
Write down the ip address. Now go to google and search 'what is my ip'. This gives you your external ip. When you go to this website, you will see your own IP address. Right below that IP address you see:.
Now you have something to show when you explain your question to other people. Then how come this website did manage to show my internal IP address?
That is just one ISP and one customer amongst millions.
Addressing of blocks is not sequential, a country will not have a single contiguous block, it will have 's to 's of blocks that are allocated in small sequences. I will give you an idea of how far off geo location by this method is, Yahoo and other sites seem to think I live in Maidenhead, Kent. Nope, sorry, never lived in Kent, I have an Aunt that lives near to Maidenhead that I haven't seen in 36 years, but I don't live in Maidenhead, I live about 2 hours drive north in the East Midlands.
The following code is for all Windows NT 5. Get the client IP code:. Method 2 all platforms and browsers : To get the IP of the client in the network, the premise is that the client has to be connected to the network.
Sina interface is used. Change 0. There are other irrelevant contents on the page. These contents tell us which interfaces can be invoked, the parameters of interface invocation and the way to use them.
Through the js interface call above, we can determine which city to belong to, and directly display the relevant information of the city. It is very helpful to determine the source of users for the first time for websites requiring city switching. Method 1 IE only for IE and client IE allows AcitiveX to run : Call the VBS script to get the computer name some people don't know what a computer name is, simply explain that it is the physical name of the machine rather than the user name you are using and the login user name.
Method 2 IE only for IE and client IE allows AcitiveX to run : Get the computer name, login username and domain name if you join the domain, show which domain your machine is in.
Below are all the free active IP lookup services I could find and the information they return.
If you know of any more, then please add a comment and I'll update this answer. Most of these services also offer a paid tier in case you want more features like SSL support. Also, as skobaljic noted in the comments below, the request quotas are mostly academic since this is happening client-side and most end users will never exceed the quota.
This solution would not longer work because browsers are fixing webrtc leak: for more info on that read this other question: RTCIceCandidate no longer returning IP. RTCPeerConnection w. Note: This new minified code would return only single IP if you want all the IPs of the user which might be more depending on his networkuse the original code I have modified the source code, reduced the lines, not making any stun requests since you only want Local IP, not the Public IP, the below code works in latest Firefox and Chrome, just run the snippet and check for yourself:.
RTCPeerConnection window. And reading the ice candidates from local session description and onIceCandidateEvent we can tell the IP of the user. Note : The telize. Most of the answers here "work around" the need for server-side code by Hitting someone else's server. Which is a totally valid technique, unless you actually do need to get the IP address without hitting a server. Traditionally this wasn't possible without some sort of a plugin and even then, you'd likely get the wrong IP address if you were behind a NAT routerbut with the advent of WebRTC it is actually possible to do this Here's a working JS example instead of wondering why this answer has so few votes, try it yourself to see it in action :.
If using express...
How can I determine the IP address of a given request from within a controller? For example in express :. In your request object there is a property called connectionwhich is a net. Socket object. The net. Socket object has a property remoteAddresstherefore you should be able to get the IP with this call:. See documentation for http and net. As juand points out in the comments, the correct method to get the remote IP, if the server is behind a proxy, is request.
Note that sometimes you can get more than one IP address in req. Also, an x-forwarded-for header will not always be set which may throw an error. In this example, the request passed through proxy1proxy2and then proxy3. This is the solution suggested by Arnav Gupta with a fix Martin has suggested below in the comments for cases when x-forwarded-for is not set :. It will make the best attempt to get the user's IP address or returns You can use request-ipto retrieve a user's ip address.
It handles quite a few of the different edge cases, some of which are mentioned in the other answers. If the x-forwarded-for header is there then use that, otherwise use the. The x-forwarded-for header is added to requests that pass through load balancers or other types of proxy set up for HTTP or HTTPS it's also possible to add this header to requests when balancing at a TCP level using proxy protocol. This is because the request. By using an OR statement, in the order above, you check for the existence of an x-forwarded-for header and use it if it exists otherwise use the request.
If you are running your app behind Nginx or any proxy, every single IP addresses will be If you're using express version 3. I realize this has been answered to death, but here's a modern ES6 version I wrote that follows airbnb-base eslint standards. The order is client,proxy1,proxy2, In the real world, people implement proxies that may supply whatever they want in this header.
If you are behind a load balancer or something, you can at least trust the first IP in the list is at least whatever proxy some request came through. In node Had the same problem Learn more.
How to determine a user's IP address in node Ask Question. Asked 8 years, 5 months ago. Active 19 days ago.