As you can see by the status map below C4G CORS are all online and working as expected. C4Gnet.XYZ subscribers have not and will not be affected by the current Federal Government shutdown.
Due to the Federal Government shutdown, NOAA.gov and most associated web sites are unavailable. However C4G and the services it provides remain online and because the C4G is the original source for nearly all CORS data here in Louisiana and we know how much the positioning community relies on this data, C4G has setup an HTTP server with access to raw GNSS data from most of the Louisiana National CORS sites. This service is offered to the public free of charge by C4G and is always in place, even when NGS is unable to make CORS data available.
More information on C4Gnet.XYZ and the services offered by the C4G can be found at the C4Gnet Real time Network portal site at http://c4gnet.lsu.edu/ or on the C4G website at http://c4g.lsu.edu/.