National Centers for Environmental Information / National Operational Model Archive and Distribution System Catalog https://www.ncei.noaa.gov/thredds/catalog/model-gfs-004-files/202103/20210321/catalog.html

Dataset Size Last Modified
     Folder  20210321   --
         GFS Grid 4 2021-03-21 18:00 UTC fct:006.grb2 100.5 Mbytes 2021-03-22T08:40:49.781Z
         GFS Grid 4 2021-03-21 18:00 UTC fct:003.grb2 100.2 Mbytes 2021-03-22T08:40:49.816Z
         GFS Grid 4 2021-03-21 18:00 UTC fct:000.grb2 91.73 Mbytes 2021-03-22T08:40:49.414Z
         GFS Grid 4 2021-03-21 12:00 UTC fct:006.grb2 101.0 Mbytes 2021-03-21T20:40:46.617Z
         GFS Grid 4 2021-03-21 12:00 UTC fct:003.grb2 100.2 Mbytes 2021-03-21T20:40:44.501Z
         GFS Grid 4 2021-03-21 12:00 UTC fct:000.grb2 91.83 Mbytes 2021-03-21T20:40:44.014Z
         GFS Grid 4 2021-03-21 06:00 UTC fct:006.grb2 101.0 Mbytes 2021-03-21T20:40:44.673Z
         GFS Grid 4 2021-03-21 06:00 UTC fct:003.grb2 100.0 Mbytes 2021-03-21T20:40:44.942Z
         GFS Grid 4 2021-03-21 06:00 UTC fct:000.grb2 91.54 Mbytes 2021-03-21T20:40:44.437Z
         GFS Grid 4 2021-03-21 00:00 UTC fct:006.grb2 100.7 Mbytes 2021-03-21T08:40:44.047Z
         GFS Grid 4 2021-03-21 00:00 UTC fct:003.grb2 100.1 Mbytes 2021-03-21T08:40:43.449Z
         GFS Grid 4 2021-03-21 00:00 UTC fct:000.grb2 91.19 Mbytes 2021-03-21T08:40:43.879Z

NCEI-NC THREDDS Server at NCEI see Info
Documentation