Caller ID said "International".  Called 2x today - no message either time.

I answered the call and there was no response from the caller.

Called and did not leave a message

We got a call from this number today at 12:21 pm and didn't answer. The caller ID was UNKNOWN NAME. No voice mail message was left. The number is spoofed. When I called back (our number is hidden by default on outgoing calls) I heard a recorded message from Verizon Wireless that the number has been changed, disconnected, or is no longer in service. It will be added to our call blocker. I highly recommend such a device to avoid these nuisances.

Same! Someone called twice today without leaving a message.