Received six calls within a 3 hour span from this number. They left a message saying they were Daniel Martin from the Internal Revenue Service and to not ignore this message. Said to call the number back as it is the IRS Hotline to discuss a discrepancy in my tax return. Please be aware this is phishing scam as the IRS always sends an official notice through the mail and does not call. Plus this is a cell number in California. The IRS help line is a toll free call.