User Agent Details:Mozilla/4.0 (compatible; MSIE 6.0; X11; Linux i686 ; en) ...

On this page you can find user agent lookup and user agent checker for custom user agent, just need to paste it to input field. It's showing you user agent browser, user agent data, browser branch, name, full name and many-many others. All data user agent details that you can see here fetched on server side (without JavaScript). The full version also detects most spiders, and an assortment of uncommon browsers and other user agents. User agent detail fetch based on analysis user agent string, that you giving us, and some knowledge base thta helping to know some options like "activexcontrols", "css version".
HTTP USER AGENT - it's your user agent from request.
Browser branch name - it's common name if browser (for example for all versions of Firefox 2 (2.0.102, 2.0.104) it will be Firefox 2.0
Browser full name - version on full browser name (example Mozilla/Firefox, looking like in http user agent info
ProductSub - biggest part of cases it's date of browser update, in case of Linux and Firefox - can be like "20081216".
Additonal Info section - information about supporting technologies by browser (cookie,iframe, and other), information taken not from header - it's taken from our base.
This tool is very simple, just paste useragent to input field and push "Go" for user agent tool.
We have several libs with already parsed user agents, and it's help to explain string during lookup. Thats why result can have different length and with different fields set. The blocks that can be avaible: 1-3 blocks exactly after "Common Info" block, and 1-3 blocks of "Similar" results.
User agent sniffing refers to the practice of websites showing different content when viewed with a certain user agent. On the Internet, this will result in a different site being shown when browsing the page with a specific browser.

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Common Info
HTTP USER AGENTMozilla/4.0 (compatible; MSIE 6.0; X11; Linux i686 ; en) Opera 10.00
Browser branch nameOpera 10.00
Browser nameOpera
Browser version10.00
Operation SystemLinux, Smart Move!!!
Browser full nameOpera 10.00

NameOpera 10.00
Explanating components of
Mozilla/4.0 (compatible; MSIE 6.0; X11; Linux i686 ; en) Opera 10.00
MozillaThis is Mozilla based browser
4.0 Mozilla Version
compatible Compatibility flag
Indicates that this browser is compatible with a common set of features
MSIE 6.0Opera - pretends to be Microsoft Internet Explorer
Version 6.0
X11X Window System
a windowing system for bitmap displays -
Linux i686Operation System, CPU info:
Linux - running on a Intel Pentium Pro CPU
enLanguage Tag, indicates the language for which the client had been localized (e.g. menus and buttons in the user interface) :
OperaOpera -
10.00Browser version

Similar User Agents
User-AgentOpera/6.x (Linux 2.4.8-26mdk i686; U) [en]
DescriptionOpera 6.x- Mandrake Linux

User-AgentOpera/4.8 (Linux 2.7; )
NameOpera 4.x
DescriptionOpera is a web browser and Internet suite developed by the Opera Software company. Opera handles common Internet-related tasks such as displaying web sites, sending and receiving e-mail messages, managing contacts, IRC online chatting, downloading files via BitTorrent, and reading web feeds. Opera is offered free of charge for personal computers and mobile phones, but for other devices it must be paid for.

Additonal Info about inputed User Agent
commentOpera 10.00
browser_makerOpera Software ASA