Who called from 7342412640

I've been getting strange calls from a different unknown number
every morning since last week. first it was 317 area code,
then 313 area code, now this 734 number.
I answered, no one would talk, then finally they hung up.
creepy.

They called again yesterday.No idea why.

called again this morning at 11:00 am.
Who is this?

other strange random numbers calling me
313-538-2240
317-247-8167
609-939-8301
512-589-0744
850-244-2434
888-274-9834
888-570-5007
866-362-8816

another random number

718-943-4722