Received a call from this number with no response to my "hello". Returned the call and only got one ring each time with the same type of dead air without any indication of a disconnect.
Just received a call from 925-331-6215, who asked for one of our IT Managers. Foreign man said he was calling on "behalf" of IBM....yeah right! Get these types of calls all the time. They are usually trying to offer white papers, but similar callers claim to be from IBM, UPS, FEDEX, Citbank, etc. They are most likely phishing for personal information!