Received multiple phone calls with a 336 area code - they are calling all day long.  I have caller ID and ability to block these calls:  They are the following:336-408-1257, 405-1338, 408-1208, 408-1437, 409-0904, 409-0949, 409-1117, 409-1132, 409-1256, 409-1733, 409-1749, 409-1901, 410-1035, 411-1651, 412-1239, 412-1732, 415-1146, 415-1709 - there are at least another 10 or 12 - it's one call right after the other all day