Preston Gralla has a great story on ComputerWorld that covers the latest Insider Preview build for Windows 10, with a recap of all the versions in that particular build tree.
What follows is a list of every preview build of Redstone 3, which will officially be named the Windows 10 Fall Creators Update, starting with the most recent. For each build, we've included the date of its release and a link to Microsoft's announcement about it. We've also kept the list of all the preview builds that led up to Creators Update, which are below the builds of the Fall Creators Update.
Note: This story covers Insider Preview builds for the PC version of Windows 10, not the phone version. If you're looking for information about updates being rolled out to all Windows 10 users, not previews for Microsoft Insiders, see "Windows 10: A guide to the updates."
Windows 10 Insider Preview Build 16273

Release date: August 23, 2017
With this build, Microsoft starts to make a sprint toward releasing the Windows 10 Fall Creators Update. The builds have been branched into their own “fork,” called RS3_RELEASE — the exact same thing Microsoft did when it began to get close to releasing the Windows 10 Creators Update, when it branched into RS2_RELEASE.
Read the whole shebang at Windows 10 Redstone: A guide to the builds | Computerworld.

--Ed--