Here’s a script I wrote that retrieves all the Windows 10 build information, including Insider level when enabled.
And here’s a list of sites that provide information about the builds, releases, version numbers etc.
http://changewindows.org/platform/desktop
https://technet.microsoft.com/en-us/windows/release-info.aspx
https://support.microsoft.com/en-us/help/12387/windows-10-update-history?ocid=client_wu