Standard ASCII Set

The chart below represents the Standard American Standard Code for Information Interchange (ASCII) set.  Each character is seven bits long.  Usually, however, the character is stored in its own 8-bit byte.  This extra bit has been used as a parity bit.  More often, several systems use all 8 bits to define extended ASCII or high ASCII ; ISO has defined ISO 8859-1 through 8859-15 as such standards.  These sets are not represented in data sets within the NSSDC.  Such systems use the extra 128 characters to store non-English characters, graphics, and mathematical symbols.  ASCII was originaly designed for use with teletypes (long distance typewriters, if you will), so that the use of some of the control characters are quite obscure today.  In addition, some systems in use at this writing interpret CR and LF in slightly different ways.
 
Decimal Hex Char.  Comment
Decimal Hex Char.
Decimal Hex Char.
Decimal Hex Char.
0 00 NUL Null
32 20 Space
64 40 @
96 60 `
1
01
 SOH Start of Heading
33 21 !
65 41 A
97 61 a
2 02 STX Start of Text
34 22 "
66 42 B
98 62 b
3 03 ETX End of Text
35 23 #
67 43 C
99 663 c
4 04 EOT End of Transmission
36 24 $
68 44 D
100 64 d
5 05 ENQ Enquiry
37 25 %
69 45 E
101 65 e
6 06 ACK Acknowledge
38 26 &
70 46 F
102 66 f
7 07 BEL Bell (Ding!)
39 27 '
71 47 G
103 67 g
8 08 BS Backspace
40 28 (
72 48 H
104 68 h
9 09 HT Horizontal Tab
41 29 )
73 49 I
105 69 i
10 0A LF Line Feed
42 2A *
74 4A J
106 6A j
11 0B VT Vertical Tab
43 2B +
75 4B K
107 6B k
12 0C FF Form Feed (new page)
44 2C ,
76 4C L
108 6C l
13 0D CR Carraige Return
45 2D -
77 4D M
109 6D m
14 0E SO Shift Out
46 2E .
78 4E N
110 6E n
15 0F SI Shift In
47 2F /
79 4F O
111 6F o
16 10 DLE Data Link Escape
48 30 0
80 50 P
112 70 p
17 11 DC1 Device Control 1
49 31 1
81 51 Q
113 71 q
18 12 DC2 Device Control 2
50 32 2
82 52 R
114 72 r
19 13 DC3 Device Control 3
51 33 3
83 53 S
115 73 s
20 14 DC4 Device Control 4
52 34 4
84 54 T
116 74 t
21 15 NAK Negative Acknowledge
53 35 5
85 55 U
117 75 u
22 16 SYN Synchronous Idle
54 36 6
86 56 V
118 76 v
23 17 ETB End of Transmission Block
55 37 7
87 57 W
119 77 w
24 18 CAN Cancel
56 38 8
88 58 X
120 78 x
25 19 EM End of Medium
57 39 9
89 59 Y
121 79 y
26 1A SUB Substitute
58 3A :
90 5A Z
122 7A z
27 1B ESC Escape
59 3B ;
91 5B [
123 7B {
28 1C FS File Separator
60 3C <
92 5C \
124 7C |
29 1D GS Group Separator
61 3D =
93 5D ]
125 7D }
30 1E RS Record Separator
62 3E >
94 5E ^
126 7E ~
31 1F US Unit Separator
63 3F ?
95 5F _
127 7F DEL
(Delete)

Hit your BACK button to return.

References:
(1) ASCII Encoded English (CCSD0002) (CCSDS 643.0-B-1) Blue Book, November, 1992 at ftp://nssdc.gsfc.nasa.gov/pub/ccsds/pdf/CCSDS-643.0-B-1.pdf ;
(2) ISO at http://www.iso.ch .