bit numbers (8 binary digits of either 0 or 1).  Therefore, the range of decimal numbers for an octet is 0 to 255,  because 11111111 in binary is 255 in decimal. The IP addresses on  Stanleys screen each contain one octet higher than 255 (such as 312  in the first example), which is apparently the filmmakers way of  ensuring that no ones real IP address appeared.