Who called from 4166378458

I live in Toronto, but the number range as long-distance.  They call frequently, but never answer and they eventually hangup.  Don't understand why they both?  Might be trying to locate active phone numbers and don' recommend wasting anymore time by answering.

This number has been calling me several times leaving no message in the answering machine.

Got one today . As previous post i got no message.

7;17pm in mississauga, ontario.  this number called.  no name shown.  i didn't pick up.  they hung up after 5 rings so it didn't even go to voicemail.

This number called many times but never answer when I pick up.