CID for 4156709474 was "San Francisco"
IRS scam. Roborecording on answering machine stated that the issue was related to unspecified tax issues (I have none). CallerID was "San Francisco." Unknown caller, synthesized female voice, non-threatening tone - first part of robocall mssg began prior to start of recording. Gave the calling number as the number to call back. Ended "...hope to hear from you soon." Threatened action if no response. Balance of recording inferred IRS link. Reverse lookup on White Pages site gave a server error. No complaints as of just now about this number on 800 lookup or Who Calls Me. Not associated with a Facebook account. Phone Lookup says caller's number is an unpublished landline associated with the SW corner of Van Ness and Market St. in San Francisco - site of a former car dealership/Goodwill site that is under development as apts, as is much of the rest of that intersection. The location is near, but not equal to, the IRS SanFrancisco location. Phone number does not match the main phone for the IRS.
Reported to https://www.treasury.gov/tigta/contact_report_scam.shtml