Ever wonder what version of vmware vsphere you running or what verion your ESXi host is? here a short overview of 5.5 products Version Release Date Build Number Installer Build Number ESXi 5.5 Patch 4 2015-01-27 2403361 N/A ESXi 5.5 Express Patch 5 2014-12-02 2302651 N/A ESXi 5.5 Patch 3 2014-10-15 2143827 N/A ESXi 5.5 Update 2 2014-09-09 2068190 N/A ESXi 5.5 Patch 2 2014-07-01 1892794 N/A ESXi 5.5 Express Patch 4 2014-06-11 1881737 N/A ESXi 5.5 Update 1a 2014-04-19 1746018 N/A ESXi 5.5 Express Patch 3 2014-04-19 1746974 N/A ESXi 5.5 Update 1 2014-03-11 1623387 N/A ESXi 5.5 Patch [...]