Have gotten several calls from this number. They don't leave a message.

Call received from New York, NY. Did not recognize, did not answer and no message was left, then checked this website. Have immeiately blocked number.

This number called 3 times in a row and left no message.

I received a call from 646-779-7157 on Tuesday morning closed to noon.  The caller ID didn't show any info other than their number.  I don't recognized the number and it's the same area code in my city, New York City.   From my experience, I believed that is a soliciting phone call with a system that can generate a temporary caller ID from the same city where you lived.

I than called that number back to see who they are.  But I have to hide my number to appear in their caller ID in case they still wanted to test if my number is a legitimate number so that they will try again in the future.  I then dialed *67 (that can hide my number) before dialing -646-779-7157.  It rings once and a robot answered with a message: "Thanks for calling.  The survey that you were called for has now finished.  If you would like to be removed from our list for future calls, please press nine."

Now I know this is an illegal call from a marketing company.  I didn't press nine and I advised everyone not to do so because that would allow them to confirm your number is a good number.  Since I have registered to the federal government's "DO NOT CALL REGISTRY" I am going to file a complaint online.

Here is the website to report unwanted calls:  https://complaints.donotcall.gov/complaint/complaintcheck.aspx
National Do not call Registry:  https://www.donotcall.gov/default.aspx