A new Windows 10 Insider Preview build 15051 for PC and mobile build 10.0.15051.0 details appear online. The new builds were compiled on March 3, 2017.
This new build 10.0.15051.0 (rs2_release.170303-1951) is expected to release to Fast ring members this week. Microsoft is now getting closer to RTM build.
Windows 10 Creators Update is releasing next month.