Reverse Phone Number Search | Phone Directory by Area Code Reverse Lookup Phone Search for Android Caller information for 415-231-3734 Here's what we found for the phone number 415-231-3734. Based on the 415 area code, this is a phone number from California. Caller Name: Internal Revenue Service CA User Feedback Website Visitor IRS scam! Will claim you owe taxes. Will threaten you with police and freezing of income. Download our free reverse phone search app for Android to view all comments about this caller, or to submit your own.