Surfing 'DNA' - internet fingerprints/tracks

Every time you visit a website you leave a trail - a bit like 'digital DNA' or a fingerprint.

This is completely normal but it's useful to know the type of data that's available to website owners and what details you are leaving behind.

Some ISPs leave personal information about your account so it's worth checking.

This page shows some of the details left by your visit - see below... 

Your IP Address:

3.128.171.77

The resolved host (ISP) for your IP Address:

ec2-3-128-171-77.us-east-2.compute.amazonaws.com3.128.171.77

User Agent - Contains your Device OS, Browser and Browser Version:

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

Your screen resolution:

Referer - website link to this page:

CODE USED TO DISPLAY WEBSITE VISITOR DETAILS

I'm using PHP and JavaScript to display these website visitor details.
 

CODE:

Your IP Address:
echo $_SERVER["REMOTE_ADDR"];

The resolved host (ISP) for your IP Address:
$hostname = gethostbyaddr($_SERVER['REMOTE_ADDR']);
echo $hostname;
echo $_SERVER["REMOTE_ADDR"];

User Agent - Your Device OS and Browser and Browser version:
echo $_SERVER["HTTP_USER_AGENT"];

Your screen resolution:
document.write(screen.width+'x'+screen.height);

Referer:
echo $_SERVER["HTTP_REFERER"];