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ASCII codes



ASCII stands for American Standard Code for Information Interchange (or American Standard Code for Information Exchange), delivered in English asci [æski], while in Italian it is commonly pronounced asci [aʃʃi].

It is a system of 7-bit character encoding [1] commonly used in computers, proposed by engineer Bob Bemer of IBM in 1961, and subsequently accepted as a standard by ISO (ISO 646). Not to be confused with the 8-bit extensions then proposed, this code is sometimes referred to as US-ASCII.

At the initial specification based on 7-bit codes were followed over the years many proposals for extension to 8 bits, with the aim of doubling the number of characters represented. In the IBM PC is made for the use of just one of these extensions, now de facto standard, called extended ASCII or high ASCII. In ASCII, the accented characters are added, semi-graphics symbols and other symbols of less common. The extended ASCII characters are encoded in so-called code pages.

Asteroid 3568 is named for this ASCII character encoding.

Table of characters

The following table is relative to the U.S. ASCII code, ANSI X3.4-1986 (ISO 646 International Reference Version). The decimal code number from 0 to 31 and 127 are non-printable characters (control codes). The 32 corresponds to the character of "space". Codes 32 to 126 are printable characters.

Legend:

* Char - The printable representation of the character, if present
* Dec - The decimal code of the character
* Row / Col - The decimal representation of row / column of the character
* Oct - The octal character
* Hex - The Hex code of the character

Char Dec Col / Row Oct Hex Name Description
0 00/00 0 0 NUL (Ctrl-@) NULL
1 00/01 1 1 SOH (Ctrl-A) START OF HEADING
2 00/02 2 2 STX (Ctrl-B) START OF TEXT
3 00/03 3 3 ETX (Ctrl-C) END OF TEXT
4 00/04 4 4 EOT (Ctrl-D) END OF TRANSMISSION
5 00/05 5 5 ENQ (Ctrl-E) ENQUIRY
6 00/06 6 6 ACK (Ctrl-F) ACKNOWLEDGE
7 00/07 7 7 BEL (Ctrl-G) BELL (Beep)
8 00/08 10 8 BS (Ctrl-H) BACKSPACE
9 00/09 11 9 HT (Ctrl-I) HORIZONTAL TAB
10 00/10 12 0A LF (Ctrl-J) LINE FEED
11 00/11 13 0B VT (Ctrl-K) VERTICAL TAB
12 00/12 14 0C FF (Ctrl-L) FORM FEED
13 00/13 15 0D CR (Ctrl-M) CARRIAGE RETURN
14 00/14 16 0E SO (Ctrl-N) SHIFT OUT
15 00/15 17 0F YES (Ctrl-O) SHIFT IN
16 01/00 20 10 DLE (Ctrl-P) DATA LINK ESCAPE
17 01/01 21 11 DC1 (Ctrl-Q) CONTROL DEVICE 1 (XON)
18 01/02 22 12 DC2 (Ctrl-R) DEVICE CONTROL 2
19 01/03 23 13 DC3 (Ctrl-S) CONTROL DEVICE 3 (XOFF)
20 01/04 24 14 DC4 (Ctrl-T) 4 CONTROL DEVICE
21 01/05 25 15 NAK (Ctrl-U) NEGATIVE ACKNOWLEDGE
22 01/06 26 16 SYN (Ctrl-V) SYNCHRONOUS IDLE
23 01/07 27 17 ETB (Ctrl-W) END OF TRANSMISSION BLOCK
24 01/08 30 18 CAN (Ctrl-X) CANCEL
25 01/09 31 19 EM (Ctrl-Y) END OF MEDIUM
26 01/10 32 1A SUB (Ctrl-Z) SUBSTITUTE
27 01/11 33 1B ESC (Ctrl-[) ESCAPE
28 01/12 34 1C FS (Ctrl-\) FILE SEPARATOR
29 01/13 35 1D GS (Ctrl-]) GROUP SEPARATOR
30 01/14 36 1E RS (Ctrl-^) RECORD SEPARATOR
31 01/15 37 1F U.S. (Ctrl-_) UNIT SEPARATOR
32 02/00 40 20 SPACE
! 33 02/01 41 21 Exclamation Mark
" 34 02/02 42 22 QUOTATION MARK
# 35 02/03 43 23 NUMBER SIGN
$ 36 02/04 44 24 DOLLAR SIGN
% 37 02/05 45 25 PERCENT SIGN
& 38 02/06 46 26 Ampersand
' 39 02/07 47 27 Apostrophe
( 40 02/08 50 28 LEFT Parenthesis
) 41 02/09 51 29 RIGHT Parenthesis
* 42 02/10 52 2A Asterisk
+ 43 02/11 53 2B PLUS SIGN
, 44 02/12 54 2C PARAGRAPH
- 45 02/13 55 2D HYPHEN HYPHEN-MINUS, MINUS SIGN
. 46 02/14 56 2E PERIOD, FULL STOP
/ 47 02/15 57 2F SOLIDUS, SLASH
0 48 03/00 60 30 DIGIT ZERO
1 49 03/01 61 31 DIGIT ONE
2 50 03/02 62 32 DIGIT TWO
3 51 03/03 63 33 THREE DIGIT
4 52 03/04 64 34 DIGIT FOUR
5 53 03/05 65 35 FIVE DIGIT
6 54 03/06 66 36 DIGIT SIX
7 55 03/07 67 37 DIGIT SEVEN
8 56 03/08 70 38 DIGIT EIGHT
9 57 03/09 71 39 DIGIT NINE
: 58 03/10 72 3A COLON
; 59 03/11 73 3B Semicolon
< 60 03/12 74 3C LESS-THAN SIGN, LEFT ANGLE BRACKET
= 61 03/13 75 3D EQUALS SIGN
> 62 03/14 76 3E GREATER-THAN SIGN, RIGHT ANGLE BRACKET
? 63 03/15 77 3F QUESTION MARK
@ 64 04/00 100 40 COMMERCIAL AT SIGN
A 65 04/01 101 41 CAPITAL LETTER A
B 66 04/02 102 42 CAPITAL LETTER B
C 67 04/03 103 43 CAPITAL LETTER C
D 68 04/04 104 44 CAPITAL LETTER D
It 69 04/05 105 45 CAPITAL LETTER E
F 70 04/06 106 46 CAPITAL LETTER F
G 71 04/07 107 47 CAPITAL LETTER G
H 72 04/08 110 48 CAPITAL LETTER H
The 73 04/09 111 49 CAPITAL LETTER I
J 74 04/10 112 4A CAPITAL LETTER J
K 75 04/11 113 4B CAPITAL LETTER K
The 76 04/12 114 4C CAPITAL LETTER L
M 77 04/13 115 4D CAPITAL LETTER M
N 78 04/14 116 4E CAPITAL LETTER N
O 79 04/15 117 4F CAPITAL LETTER O
P 80 05/00 120 50 CAPITAL LETTER P
Q 81 05/01 121 51 CAPITAL LETTER Q
R 82 05/02 122 52 CAPITAL LETTER R
S 83 05/03 123 53 CAPITAL LETTER S
T 84 05/04 124 54 CAPITAL LETTER T
U 85 05/05 125 55 CAPITAL LETTER U
V 86 05/06 126 56 CAPITAL LETTER V
W 87 05/07 127 57 CAPITAL LETTER W
X 88 05/08 130 58 CAPITAL LETTER X
Y 89 05/09 131 59 CAPITAL LETTER Y
Z 90 05/10 132 5A CAPITAL LETTER Z
[ 91 05/11 133 5B LEFT SQUARE BRACKET
\ 92 05/12 134 5C REVERSE SOLIDUS (BACKSLASH)
] 93 05/13 135 5D RIGHT SQUARE BRACKET
^ 94 05/14 136 5E Circumflex ACCENT
_ 95 05/15 137 5F LOW LINE, UNDERLINE
` 96 06/00 140 60 GRAVE ACCENT
to 97 06/01 141 61 SMALL LETTER a
b 98 06/02 142 62 SMALL LETTER b
c 99 06/03 143 63 SMALL LETTER c
d 100 06/04 144 64 SMALL LETTER d
and 101 06/05 145 65 SMALL LETTER and
f 102 06/06 146 66 SMALL LETTER f
g 103 06/07 147 67 SMALL LETTER g
h 104 06/08 150 68 SMALL LETTER h
the 105 06/09 151 69 SMALL LETTER i
j 106 06/10 152 6A SMALL LETTER j
k 107 06/11 153 6B SMALL LETTER k
the 108 06/12 154 6C SMALL LETTER l
m 109 06/13 155 6D SMALL LETTER m
n 110 06/14 156 6E SMALL LETTER n
or 111 06/15 157 6F SMALL LETTER or
p 112 07/00 160 70 SMALL LETTER P
q 113 07/01 161 71 SMALL LETTER q
r 114 07/02 162 72 SMALL LETTER r
s 115 07/03 163 73 SMALL LETTER s
t 116 07/04 164 74 SMALL LETTER t
u 117 07/05 165 75 SMALL LETTER u
v 118 07/06 166 76 SMALL LETTER v
w 119 07/07 167 77 SMALL LETTER w
x 120 07/08 170 78 SMALL LETTER x
y 121 07/09 171 79 SMALL LETTER y
z 122 07/10 172 7A SMALL LETTER z
{ 123 07/11 173 7B LEFT CURLY BRACKET, LEFT BRACE
| 124 07/12 174 7C VERTICAL LINE, VERTICAL BAR
} 125 07/13 175 7D RIGHT CURLY BRACKET, RIGHT BRACE
~ 126 07/14 176 7E TILDE
127 07/15 177 7F DELETE