800-435-1646

Same here.  Received call.  No one answered when I picked up.
This has the earmarks of a "ping call" (i.e. some automated process that validates that phone numbers).

This number calls everyday. When I answer there is nobody there. Don't have time for these calls. How do I get it to stop?

I have received this number calls couple days this week, as you know there is a test call, hang up itself after I picked the call up.

I live in zip code 94303 area.