"IRS Officer, investigation" scam. Recorded message, tells to call that number.
This number is one of the latest spam tactics that uses the same Area Code and prefix as your number. Called it back, got ,message "The person you are calling is not receiving calls at this time".
This # called my mobile, left no message. Has same first six digits as my mobile.
ET (UTC -05:00) Regular Landline 10003, 10002, 10001, & 10007