ASCII, American Code for Information Interchange. Character Symbols.

(Pronounced "ass-kee." or "ask-key.")

American Code for Information Interchange - Pronounced "ass-kee." or "ask-key". A way of represent characters. The first 128 characters are standardized, and the first 32 of those are control codes, which are not visible characters but codes that can be used for text formatting or actions, such as form-feed. After the 32 control codes, the next 96 standardized characters represent numbers, letters (both uppercase and lowercase), and standard punctuation marks. The last 128 characters represent different things on different platforms. The total number of characters is 256, (8 bits of binary data), )nly the first 7 bits 0 to 127 are defined. ( The 8th bit may have been used as a parity check).

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Please note there could be errors below. Also there are different numbering systems. If you spot any errors please click here and let me know the exact error.

 
Decimal
ASCII
Description HTML

Hex

Binary

Octal  

0

 NUL null  

0h

00000000

000
1

SOH

 Start of Heading Control-A  
1h
00000001
001
2
STX Start of Text Control-B  
2h
00000010
002
3
ETX End of Text Control-C  
3h
00000011
003
4
EOT End of Transmission Control-D  
4h
00000100
004
5
ENQ Enquiry Control-E  
5h
00000101
005
6
ACK Acknowledge Control-F  
6h
00000110
006
7
BELL bell  
7h
00000111
007
8
BS Back Space  
8h
00001000
010
9
TAB Horizontal tab  
9h
00001001
011
10

LF

Line feed  
Ah
00001010
012
11
VF
Vertical Tab  
Bh
00001011
013
12
FF
Form Feed (New Page)  
Ch
00001100
014
13
CR
Carriage Return  
Dh
00001101
015
14
SO
Shift Out Control-N  
Eh
00001110
016
15
SI
Shift In Control-O  
Fh
00001111
017
16
DLE
Data Link Escape Control-P  
10h
00010000
020
17

DC1

Device Control 1 Control-Q  
11h
00010001
021
18
DC2 Device Control 2 Control-R  
12h
00010010
022
19
DC3 Device Control 3 Control-S  
13h
00010011
023
20
DC4
Device Control 4 Control-T  
14h
00010100
024
21
NAK
Negative Acknowledge Control-U  
15h
00010101
025
22
SYN Synchronise Idle Control-V  
16h
00010110
026
23
EBT End of Transmission Block Control-W  
17h
00010111
027
24
CAN Cancel Control-X  
18h
00011000
030
25
EM End of Medium Control-X  
19h
00011001
031
26
SUB Substiute Control-Y  
1Ah
00011010
032
27
ESC Escape Control-Z  
1Bh
00011011
033
28
FS File Separator  
1Ch
00011100
034
29
GS Group Separator  
1Dh
00011101
035
30
RS
Record Separator  
1Eh
00011110
036
31
UN
Unit Separator  
1Fh
00011111
037
 

Printable Characters 32 to 127 decimal.
 
32 space Space   20h 00100000 040
33  ! Exclamation mark   21h 00100001 041
34 " Quotation mark   22h 00100010 042
35 # Number sign   23h 00100011 043
36 $ Dollar sign   24h 00100100 044
37 % Percent sign   25h 00100101 045
38 & Ampersand   26h 00100110 046
39 ' Apostrophe   27h 00100111 047
40 ( Left parenthesis    28h 00101000 050
41 ) Right parenthesis   29h 00101001 051
42 * Asterisk   2Ah 00101010 052
43 + Plus sign   2Bh 00101011 053
44 , Comma   2Ch 00101100 054
45 - Hyphen   2Dh 00101101 055
46 . Period (fullstop)   2Eh 00101110 056
47 / Solidus (slash)   2Fh 00101111 057
48 0     30h 00110000 060
49 1     31h 00110001 061
50 2       32h 00110010 062
51 3     33h 00110011 063
52 4     34h 00110100 064
53 5     35h 00110101 065
54 6     36h 00110110 066
55 7     37h 00110111 067
56 8     38h 00111000 070
57 9     39h 00111001 071
58 : Colon   3Ah 00111010 072
59 ; Semi-colon   3Bh 00111011 073
60 < Less than   3Ch 00111100 074
61 = Equals sign   3Dh 00111101 075
62 > Greater than   3Eh 00111110 076
63 ? Question mark   3Fh 00111111 077
64 @ Commercial at   40h 01000000 100
65 A     41h 01000001 101
66 B     42h 01000010 102
67 C     43h 01000011 103
68 D     44h 01000100 104
69 E     45h 01000101 105
70 F      46h 01000110 106
71 G     47h 01000111 107
72 H     48h 01001000 110
73 I     49h 01001001 111
74 J     4Ah 01001010 112
75 K     4Bh 01001011 113
76 L     4Ch 01001100 114
77 M     4Dh 01001101 115
78 N     4Eh 01001110 116
79 O     4Fh 01001111 117
80 P      50h 01010000 120
81 Q     51h 01010001 121
82 R     52h 01010010 122
83 S     53h 01010011 123
84 T     54h 01010100 124
85 U     55h 01010101 125
86 V     56h 01010110 126
87 W     57h 01010111 127
88 X     58h 01011000 130
89 Y     59h 01011001 131
90 Z      5Ah 01011010 132
91 [ Left square bracket   5Bh 01011011 133
92 \ Reverse solidus (backslash)   5Ch 01011100 134
93 ] Right square bracket   5Dh 01011101 135
94 ^ Caret   5Eh 01011110 136
95 _ Horizontal bar (underscore)   5Fh 01011111 137
96 ` Acute accent   60h 01100000 140
97 a     61h 01100001 141
98 b     62h 01100010 142
99 c     63h 01100011 143
100 d      64h 01100100 144
101 e     65h 01100101 145
102 f     66h 01100110 146
103 g     67h 01100111 147
104 h     68h 01101000 150
105 i     69h 01101001 151
106 j     6Ah 01101010 152
107 k     6Bh 01101011 153
108 l     6Ch 01101100 154
109 m     6Dh 01101101 155
110 n      6Eh 01101110 156
111 o     6Fh 01101111 157
112 p     70h 01110000 160
113 q     71h 01110001 161
114 r     72h 01110010 162
115 s     73h 01110011 163
116 t     74h 01110100 164
117 u     75h 01110101 165
118 v     76h 01110110 166
119 w     77h 01110111 167
120 x      78h 01111000 170
121 y     79h 01111001 171
122 z     7Ah 01111010 172
123 { Left curly brace   7Bh 01111011 173
124 | Vertical bar   7Ch 01111100 174
125 } Right curly brace   7Dh 01111101 175
126

~

 Tilde   7Eh 01111110 176
127

 DEL

     7Fh 01111111 177
 

Values Above 127 decimal are some times used for extended characters. These may not be the same on all systems.
 
128       80h 10000000 200  
129       81h 10000001 201
130        82h 10000010 202
130       83h 10000011 203
132       84h 10000100 204
133       85h 10000101 205
134       86h 10000110 206
135       87h 10000111 207
136       88h 10001000 210
137       89h 10001001 211
138       8Ah 10001010 212
139       8Bh 10001011 213
140         8Ch 10001100 214
141       8Dh 10001101 215
142       8Eh 10001110 216
143       8Fh 10001111 217
144       90h 10010000 220
145       91h 10010001 221

146

       92h 10010010 222
147       93h 10010011 223
148       94h 10010100 224
149       95h 10010101 225
150       96h 10010110 226
151       97h 10010111 227
152       98h 10011000 230
153       99h 10011001 231
154       9Ah 10011010 232
155       9Bh 10011011 233
156       9Ch 10011100 234
157       9Dh 10011101 235
158       9Eh 10011110 236
159       9Fh 10011111 237
160   Non-breaking Space &nbsp; A0h 10100000 240
161 ¡ Inverted exclamation &iexcl; A1h 10100001 241
162 ¢ Cent sign &cent; A2h 10100010 242
163 £ Pound sterling &pound; A3h 10100011 243
164 ¤ General currency sign &curren; A4h 10100100 244
165 ¥ Yen sign &yen; A5h 10100101 245
166 ¦ Broken vertical bar &brvbar; A6h 10100110 246
167 § Section sign &sect; A7h 10100111 247
168 ¨ Umlaut (dieresis) &uml; A8h 10101000 250
169 © Copyright &copy; A9h 10101001 251
170 ª Feminine ordinal &ordf; AAh 10101010 252
171 « Left angle quote, guillemotleft &laquo; ABh 10101011 253
172 ¬ Not sign &not; ACh 10101100 254
173 ­ Soft hyphen &shy; ADh 10101101 255
174 ® Registered trademark &reg; AEh 10101110 256
175 ¯ Macron accent &macr; AFh 10101111 257
176 ° Degree sign &deg; B0h 10110000 260
177 ± Plus or minus &plusmn; B1h 10110001 261
178 ² Superscript two &sup2; B2h 10110010 262
179 ³ Superscript three &sup3; B3h 10110011 263
180 ´ Acute accent &acute; B4h 10110100 264
181 µ Micro sign &micro; B5h 10110101 265
182 Paragraph sign &para; B6h 10110110 266
183 · Middle dot &middot; B7h 10110111 267
184 ¸ Cedilla &cedil; B8h 10111000 270
185 ¹ Superscript one &sup1; B9h 10111001 271
186 º Masculine ordinal &ordm; BAh 10111010 272
187 » Right angle quote, guillemotright &raquo; BBh 10111011 273
188 ¼ Fraction one-fourth &frac14; BCh 10111100 274
189 ½ Fraction one-half &frac12; BDh 10111101 275
190 ¾ Fraction three-fourths &frac34; BEh 10111110 276
191 ¿ Inverted question mark &iquest; BFh 10111111 277
192 À Capital A, grave accent &Agrave; C0h 11000000 300
193 Á Capital A, acute accent &Aacute; C1h 11000001 301
194 Â Capital A, circumflex accent &Acirc; C2h 11000010 302
195 Ã Capital A, tilde &Atilde; C3h 11000011 303
196 Ä Capital A, dieresis or umlaut mark &Auml; C4h 11000100 304
197 Å Capital A, ring &Aring; C5h 11000101 305
198 Æ Capital AE dipthong (ligature) &AElig; C6h 11000110 306
199 Ç Capital C, cedilla &Ccedil; C7h 11000111 307
200 È Capital E, grave accent &Egrave; C8h 11001000 310
201 É Capital E, acute accent &Eacute; C9h 11001001 311
202 Ê Capital E, circumflex accent &Ecirc; CAh 11001010 312
203 Ë Capital E, dieresis or umlaut mark &Euml; CBh 11001011 313
204 Ì Capital I, grave accent &Igrave; CCh 11001100 314
205 Í Capital I, acute accent &Iacute; CDh 11001101 315
206 Î Capital I, circumflex accent &Icirc; CEh 11001110 316
207 Ï Capital I, dieresis or umlaut mark &Iuml; CFh 11001111 317
208 Ð Capital Eth, Icelandic &ETH; D0h 11010000 320
209 Ñ Capital N, tilde &Ntilde; D1h 11010001 321
210 Ò Capital O, grave accent &Ograve;