Have received two calls at my workplace.  Most likely this number is a fake caller ID number.  It asks for a name and then gives options to press on the phone:
"  If you (name) please press 1 now.  To place this call on hold to allow this person to come to the phone please press 2 now.  If this is the correct household but the person is not available please press 3 now.  If this person does not live at this address please press 4.  To hear this message please press the pound sign.