Head First Networking

Appendix B. Ascii Tables: Looking Things Up

Where would you be without some trusty ASCII tables?

Understanding network protocols isn’t always enough. Sooner or later, you’re going to need to look up ASCII codes so you can understand what secrets are being passed around your network. In this appendix, you’ll find a whole bunch of ASCII codes. Whether you prefer binary, hexadecimal, or good old decimal, we’ve got just the codes you need.

ASCII tables 0-31

Note

In decimal, that is.

0	0	0 Note Just look up your decimal, hex or binary code here...	NUL	Note ...and read off the character here.
1	1	1	SOH
2	2	10	STX
3	3	11	ETX
4	4	100	EOT
5	5	101	ENQ
6	6	110	ACK
7	7	111	BEL
8	8	1000	BS
9	9	1001	HT
10	0A	1010	LF
11	0B	1011	VT
12	0C	1100	FF
13	0D	1101	CR
14	0E	1110	SO
15	0F	1111	SI
16	10	10000	DLE
17	11	10001	DC1
18	12	10010	DC2
19	13	10011	DC3
20	14	10100	DC4
21	15	10101	NAK
22	16	10110	SYN
23	17	10111	ETB
24	18	11000	CAN
25	19	11001	EM
26	1A	11010	SUB
27	1B	11011	ESC
28	1C	11100	FS
29	1D	11101	GS
30	1E	11110	RS
31	1F	11111	US

ASCII code tables 32-63

32	20	100000	Space
33	21	100001	!
34	22	100010	“
35	23	100011	#
36	24	100100	$
37	25	100101	%
38	26	100110	&
39	27	100111	’
40	28	101000	(
41	29	101001	)
42	2A	101010	*
43	2B	101011	+
44	2C	101100
45	2D	101101	-
46	2E	101110	.
47	2F	101111	/
48	30	110000	0
49	31	110001	1
50	32	110010	2
51	33	110011	3
52	34	110100	4
53	35	110101	5
54	36	110110	6
55	37	110111	7
56	38	111000	8
57	39	111001	9
58	3A	111010	:
59	3B	111011	;
60	3C	111100	<
61	3D	111101	=
62	3E	111110	>
63	3F	111111	?

ASCII code tables 64-95

64	40	1000000	@
65	41	1000001	A
66	42	1000010	B