Technology Tales

ASCII Codes

Estimated Reading Time: 2 minutes Last updated on 24^th August 2015

Having found myself looking for this from time to time, here is a table of ASCII characters and their representation in decimal, hexadecimal and octal forms together with the corresponding HTML entities. The first on the list are various non-printing characters, and I have found myself using the TAB one in programming quite often over the years. Currently, only the core ASCII characters appear but those from the extended set may be added later.

Decimal	Hexadecimal	Octal	Character	HTML
0	0	000	NUL (null)
1	1	001	SOH (start of heading)
2	2	002	STX (start of text)
3	3	003	ETX (end of text)
4	4	004	ETX (end of transmission)
5	5	005	ENQ (enquiry)
6	6	006	ACK (acknowledge)
7	7	007	BEL (bell)
8	8	010	BS (backspace)
9	9	011	TAB (horizontal tab)
10	A	012	LF (NL line feed, newline)
11	B	013	VT (vertical tab)
12	C	014	FF (NP form feed, new page)
13	D	015	CR (carriage return)
14	E	016	SO (shift out)
15	F	017	SI (shift in)
16	10	020	DLE (data link escape)
17	11	021	DC1 (device control 1)
18	12	022	DC2 (device control 2)
19	13	023	DC3 (device control 3)
20	14	024	DC4 (device control 4)
21	15	025	NAK (negative acknowledge)
22	16	026	SYN (synchronous idle)
23	17	027	ETB (end of transmission block)
24	18	030	CAN (cancel)
25	19	031	EM (end of medium)
26	1A	032	SUB (substitution)
27	1B	033	ESC (escape)
28	1C	034	FS (file separator)
29	1D	035	GS (group separator)
30	1E	036	RS (record separator)
31	1F	037	US (unit separator)
32	20	040	space	 
33	21	041	!	!
34	22	042	"	"
35	23	043	#	#
36	24	044	$	$
37	25	045	%	%
38	26	046	&	&
39	27	047	'	'
40	28	050	(	(
41	29	051	)	)
42	2A	052	*	*
43	2B	053	+	+
44	2C	054	,	,
45	2D	055	-	-
46	2E	056	.	.
47	2F	057	/	/
48	30	060	0	0
49	31	061	1	1
50	32	062	2	2
51	33	063	3	3
52	34	064	4	4
53	35	065	5	5
54	36	066	6	6
55	37	067	7	7
56	38	070	8	8
57	39	071	9	9
58	3A	072	:	:
59	3B	073	;	&#59;
60	3C	074	<	&#60;
61	3D	075	=	&#61;
62	3E	076	>	&#62;
63	3F	077	?	&#63;
64	40	100	@	&#64;
65	41	101	A	&#65;
66	42	102	B	&#66;
67	43	103	C	&#67;
68	44	104	D	&#68;
69	45	105	E	&#69;
70	46	106	F	&#70;
71	47	107	G	&#71;
72	48	110	H	&#72;
73	49	111	I	&#73;
74	4A	112	J	&#74;
75	4B	113	K	&#75;
76	4C	114	L	&#76;
77	4D	115	M	&#77;
78	4E	116	N	&#78;
79	4F	117	O	&#79;
80	50	120	P	&#80;
81	51	121	Q	&#81;
82	52	122	R	&#82;
83	53	123	S	&#83;
84	54	124	T	&#84;
85	55	125	U	&#85;
86	56	126	V	&#86;
87	57	127	W	&#87;
88	58	130	X	&#88;
89	59	131	Y	&#89;
90	5A	132	Z	&#90;
91	5B	133	[	&#91;
92	5C	134	\	&#92;
93	5D	135	]	&#93;
94	5E	136	^	&#94;
95	5F	137	_	&#95;
96	60	140	`	&#96;
97	61	141	a	&#97;
98	62	142	b	&#98;
99	63	143	c	&#99;
100	64	144	d	&#100;
101	65	145	e	&#101;
102	66	146	f	&#102;
103	67	147	g	&#103;
104	68	150	h	&#104;
105	69	151	i	&#105;
106	6A	152	j	&#106;
107	6B	153	k	&#107;
108	6C	154	l	&#108;
109	6D	155	m	&#109;
110	6E	156	n	&#110;
111	6F	157	o	&#111;
112	70	160	p	&#112;
113	71	161	q	&#113;
114	72	162	r	&#114;
115	73	163	s	&#115;
116	74	164	t	&#116;
117	75	165	u	&#117;
118	76	166	v	&#118;
119	77	167	w	&#119;
120	78	170	x	&#120;
121	79	171	y	&#121;
122	7A	172	z	&#122;
123	7B	173	{	&#123;
124	7C	174	|	&#124;
125	7D	175	}	&#125;
126	7E	176	~	&#126;
127	7F	177	DEL	&#127;