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Internet Explorer common version numbers

Microsoft official numbers
Version number displayed Internet Explorer version
4.72.3612.1713 IE 4.01 SP2
5.0.2919.6307 IE 5.01
5.00.3105.0106 IE 5.01 SP1
5.00.3315.1000 IE 5.01 SP2
5.00.3502.1000 IE 5.01 SP3
5.50.4134.0600 IE 5.5
5.50.4807.2300 IE 5.5 SP2
6.00.243x.0051 IE 6.0 beta 2 public preview
6.0.2462.0000 IE 6.0 "Refresh" w/o Smart Tags (german)
6.0.2479.0006 IE 6.0 "Refresh" w/ Smart Tags (english)
6.0.2505.0000 IE 6.0 "Refresh" w/ Smart Tags (english) WinXP RC-1
6.0.3790.0 IE 6.0 Windows 2003 Server
 
Non-official numbers found on user PCs
Version number displayed Internet Explorer version
5.00.2920.000 IE 5.0 128bit encryption