ASCII Hex Digit - No

No is the value indicating that a character is not classified as an ASCII hex digit, meaning it does not represent a hexadecimal numeral in the ASCII range, such as 0 through 9 or the letters A through F (in either uppercase or lowercase). This value applies to all other characters, including punctuation, symbols, non-ASCII letters, and even other digits from different numeral systems. It simply serves as a binary negative label for any character that fails to meet the strict definition of being one of the sixteen valid hexadecimal symbols used in ASCII encoding.

This is the default value, shared by most characters (310,319 in total), so no character list is shown.