General Info

ASCII stands for American Standard Code for Information Interchange. Computers can only understand numbers, so an ASCII code is the numerical representation of a character such as 'a' or '@' or an action of some sort. Below is the standard ASCII character set and includes descriptions of the first 32 non-printing characters.

Decimal

Hex

Character

 

0

0

NUL

(null)

1

1

SOH

(start of heading)

2

2

STX

(start of text)

3

3

ETX

(end of text)

4

4

EOT

(end of transmission)

5

5

ENQ

(enquiry)

6

6

ACK

(acknowledge)

7

7

BEL

(bell)

8

8

BS

(backspace)

9

9

TAB

(horizontal tab)

10

A

LF

(NL line feed, new line)

11

B

VT

(vertical tab)

12

C

FF

(NP form feed, new page)

13

D

CR

(carriage return)

14

E

SO

(shift out)

15

F

SI

(shift in)

16

10

DLE

(data link escape)

17

11

DC1

(device control 1)

18

12

DC2

(device control 2)

19

13

DC3

(device control 3)

20

14

DC4

(device control 4)

21

15

NAK

(negative acknowledge)

22

16

SYN

(synchronous idle)

23

17

ETB

(end of trans. block)

24

18

CAN

(cancel)

25

19

EM

(end of medium)

26

1A

SUB

(substitute)

27

1B

ESC

(escape)

28

1C

FS

(file separator)

29

1D

GS

(group separator)

30

1E

RS

(record separator)

31

1F

US

(unit separator)

32

20

Space

 

33

21

!

 

34

22

"

 

35

23

#

 

36

24

$

 

37

25

%

 

38

26

&

 

39

27

'

 

40

28

(

 

41

29

)

 

42

2A

*

 

43

2B

+

 

44

2C

,

 

45

2D

-

 

46

2E

.

 

47

2F

/

 

48

30

0

 

49

31

1

 

50

32

2

 

51

33

3

 

52

34

4

 

53

35

5

 

54

36

6

 

55

37

7

 

56

38

8

 

57

39

9

 

58

3A

:

 

59

3B

;

 

60

3C

<

 

61

3D

=

 

62

3E

>

 

63

3F

?

 

64

40

@

 

65

41

A

 

66

42

B

 

67

43

C

 

68

44

D

 

69

45

E

 

70

46

F

 

71

47

G

 

72

48

H

 

73

49

I

 

74

4A

J

 

75

4B

K

 

76

4C

L

 

77

4D

M

 

78

4E

N

 

79

4F

O

 

80

50

P

 

81

51

Q

 

82

52

R

 

83

53

S

 

84

54

T

 

85

55

U

 

86

56

V

 

87

57

W

 

88

58

X

 

89

59

Y

 

90

5A

Z

 

91

5B

[

 

92

5C

\

 

93

5D

]

 

94

5E

^

 

95

5F

_

 

96

60

`

 

97

61

a

 

98

62

b

 

99

63

c

 

100

64

d

 

101

65

e

 

102

66

f

 

103

67

g

 

104

68

h

 

105

69

i

 

106

6A

j

 

107

6B

k

 

108

6C

l

 

109

6D

m

 

110

6E

n

 

111

6F

o

 

112

70

p

 

113

71

q

 

114

72

r

 

115

73

s

 

116

74

t

 

117

75

u

 

118

76

v

 

119

77

w

 

120

78

x

 

121

79

y

 

122

7A

z

 

123

7B

{

 

124

7C

|

 

125

7D

}

 

126

7E

~

 

127

7F

DEL