https://downdetector.com/status/verizon/
See the rise in the graph starting about 5:30 AM and rising to steady state about 1:30 PM. Not as large as yesterday (approaching 800 reports, so we know it is much larger than that). From the comments at the bottom of the page the areas affected appear to be in CA and CO.
Hmmm. I wonder if this could have been predicted.......