Unintelligible much background noise as though in a large office

Called at 614 am, could hear a lot of background noise, like a lot of other people talking on phones, caller first said hello in a strong accent, then waited and said hello can you hear me? I stayed silent, they said can you hear me? I ended the call

Received call at 5:45 am.  I said hello but no response.  No sound from other end at all.  After reading about the "can you hear me" scam and reading that from someone else I am blocking number.

I forgot to mention that when I tried to call the number it said my call could not be completed as dialed.

Called at 5:51 this morning. Did not answer. Who calls at that hour?  I have also read about the "Can you hear me?" scam, so thanks for the tip.