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User agent internet explorer,user agent msie,classification,examples

Related articles

Explaining User-Agent Strings

This article about Internet Explorer (MSIE) user-agent string, which identifies your browser and provides certain system details to servers hosting Web sites you visit.


When you visit a Web page, your browser sends user-agent header string to server of page that you opening.
This string contain info about what browser you using, its version number, and details about your system, such as operating system and version.
The MSIE user-agent request header contains three parts.
  • Compatibility flag ("compatible") is used by most modern browsers (GoogleBot and Yahoo slur for example). It indicates that Internet Explorer is compatible with a common set of features.
  • Version name of browser and contains version number. version name of browser ("MSIE 6.0") identifies Internet Explorer 6.
  • Platform contain info your operating system and contains version number. platform token in example ("Windows NT 5.1") indicates Windows XP.

Version tokenDescription
MSIE 8.0Internet Explorer 8 (pre-release)
MSIE 7.0Internet Explorer 7
MSIE 7.0bInternet Explorer 7 (Beta 1 pre-release only)
MSIE 6.0Microsoft Internet Explorer 6
MSIE 6.0bInternet Explorer 6 (pre-release)
MSIE 5.5Internet Explorer 5.5
MSIE 5.01Internet Explorer 5.01
MSIE 5.0Internet Explorer 5
MSIE 5.0b1Internet Explorer 5 (pre-release)
MSIE 4.01Internet Explorer 4.01

Platform tokens describe your operating system. following table lists Internet Explorer platform tokens for last several versions of Windows.

Platform tokenDescription
Windows NT 6.0Windows Vista
Windows NT 5.2Windows Server 2003; Windows XP x64 Edition
Windows NT 5.1Windows XP
Windows NT 5.01Windows 2000, Service Pack 1 (SP1)
Windows NT 5.0Windows 2000
Windows NT 4.0Microsoft Windows NT 4.0
Windows 98; Win 9x 4.90Windows Millennium Edition (Windows Me)
Windows 98Windows 98
Windows 95Windows 95
Windows CEWindows CE

Certain optional components can also modify user-agent string (add some it's record, for example "InfoPath.1; Alexa Toolbar"); the following table shows common ones. Need to know that many other applications also modify user-agent string. Because of this, a comprehensive list is not possible. If you find additional tokens in your user-agent string, you should investigate them in more detail.

.NET CLR.NET Framework common language run time, followed by version number.
SV1Internet Explorer 6 with enhanced security features (Windows XP SP2 and Windows Server 2003 only).
Tablet PCTablet services are installed; number indicates version number.
Win64; IA64System has a 64-bit processor (Intel).
Win64; x64System has a 64-bit processor (AMD).
WOW64A 32-bit version of Internet Explorer is running on a 64-bit processor.

"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Alexa Toolbar; mxie; RssFeedEater; .NET CLR 1.1.4322; .NET CLR 2.0.50727)"
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322)"
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; InfoPath.1)"
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.0.3705; .NET CLR 1.1.4322; Media Center PC 4.0)"