ASCII (American Standard Code for Information Interchange) defines the
characters that comprise the first 128 characters of the first octet
of an 8-bit character. In RFC 3269 (UTF-8), these codes occupy a single
octet when transmitted over the wire or stored in a file. ASCII was also
adopted by the ITU as ITU-T Recommendation T.50 (International Alphabet No. 5,
or IA5).
Dec |
Hex |
Char |
Dec |
Hex |
Char |
Dec |
Hex |
Char |
Dec |
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 |
63 |
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 (Acknowledgement) |
38 |
26 |
& |
70 |
46 |
F |
102 |
66 |
f |
7 |
07 |
BEL (Bell) |
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) |
44 |
2C |
, |
76 |
4C |
L |
108 |
6C |
l |
13 |
0D |
CR (Carriage 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 Acknowledgement) |
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 |