I have received fraud/scam calls from 415-690-8134, Tiburon, CA. The caller claims to be from the IRS litigation group and says that I need to have my attorney call immediately about a tax deficiency or I will be sued. A google search of the number shows that many people are getting calls from this number and are being threatened with arrest and/or deportation unless they pay the supposed tax debt. They called me 7 times within 7 minutes this afternoon.
WE're getting repeated (couple of times a week) from this number
775-323-0318
listed as paul grabowski. sometimes leaves a blank voicemail, sometimes not.
It's got a history on 800notes.com
http://800notes.com/Phone.aspx/1-323-775-6550/3