ASCII Table

The original ASCII table consists of the first 128 characters in this table and the next 128 characters are extended from the original ASCII Table

The first 32 characters are unprintable control codes and are used to control peripherals such as printers.

Codes 32-127 are common for all the different variations of the ASCII table, they are called printable characters, represent letters, digits, punctuation marks, and a few miscellaneous symbols. You will find almost every character on your keyboard. Character 127 represents the command DEL. 

Codes 128 - 255 are according to Windows-1252 (CP-1252) which is a superset of ISO 8859-1, also called ISO Latin-1, in terms of printable characters, but differs from the IANA's ISO-8859-1 by using displayable characters rather than control characters in the 128 to 159 range. Characters that differ from ISO-8859-1 is marked by light blue color.