Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; GTB6.3; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; MDDR; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; MS-RTC LM 8; BRI/2; yie8)

Name: unknown

Family: unknown

Type: unknown

Manufacturer and Platform
OS Companyunknown
OS Familyunknown
OS Name unknown
Mobile deviceno
Parent and Version
ParentIE 8.0
Major version8
Minor version0
AOL version0
Alpha releaseno
Beta releaseno
Syndication readerno
Known crawlerno
Often bannedno
Rendering and Parsing Capabilities
CSS version2
Java Appletsyes
Background soundsyes
ActiveX controlsyes


  • Known crawler will be ticked for user agents that are known to be spiders, bots or crawlers. The lack of a tick doesn't prove that it is a bot, as there are many obscure bots which haven't yet been classified as such. And, of course, it's perfectly possible for a bot to fake the user agent of a normal browser.
  • Often banned is ticked for any known crawlers or file downloaders that are also commonly banned by server administrators. This may be for many reasons, including malicious behaviour or excess bandwith and resource use. You should not rely on this as an indicator of the malicious nature or otherwise of the bot. Truly malicious bots use fake user agents, anyway.