Just got call on my call at 15:25 US-PDT (UST -07:00) on Wednesday 03 May 2017.
Answered phone and just got dead air--they ended the call.
Suspect that it may be a robo-dialer verifying whether or not a person answers the phone.
Prepare for sales call or scam next, either from this number or from another.
Calls like this are sometimes used by data miners so that they can sell the information to somebody else.
Received calls from this number with no one on the other line, when I called back the guy answered but his accent was to heavy for me to understand what he said the name of the company was, so my girlfriend called and another guy answered with just as heavy accent as the first guy. Still don't know who they are or what they wanted.