Opentracker records each unique user and their IP address. E nrich, view, download and process IP tracker data with Opentracker. Advanced technology combined with cookies allows you to identify visitors. Use the IP tracker with an IP address to identify and collect online details based on the IP number. Other places you can also see ip addresses are in the headers of the emails you receive or the log files of routers. If you are a business that has a site or an app and you are receiving internet traffic to the site or app the you will be able to see the ip-addresses coming to your site or app. Normally an online business has a site or app as the destination and someone surfing the web is the source. In internet terms this means you need a source address, a destination address and traffic (an email or a browser action) between the two. By the same token, if a letter does not have a destination address, you will not get a letter, and there is nothing to track it back to.
If you don’t have the letter, then you also won’t have a return address.
If you receive the letter, then you can figure out where the letter came from by looking at the return address.