Same thing happened to me just minutes ago. A man with an accent called my work when I answered he asked for me by name i confirmed i was she and he said "how are you doing today?" I said fine. then he hung up.
I received a call from this number and was asked if I am (my name) and when I corrected the pronunciation they hung up on me. My call back to the number got me a message that the number is no longer in service.
Received two calls almost simultaneously from 202-625-0400. No one answered when I picked up the first. The second was answered by a man with a foreign accent who repeated my name. When I said, "This is he.", the man hung up.