ASCII, stands for American Standard Code for Information Interchange. It is a coding system that assigns numerical values to characters and symbols, allowing their representation and manipulation in computers and other electronic devices.
Hexadecimal control characters
(characters 0 to 31)
| Hex | Symbol | Description |
|---|---|---|
| 00 | NUL | Null character |
| 01 | SOH | Start of Heading |
| 02 | STX | Start of Text |
| 03 | ETX | End of Text |
| 04 | EOT | End of Transmission |
| 05 | ENQ | Enquiry |
| 06 | ACK | Acknowledge |
| 07 | BEL | Bell, Alert |
| 08 | BS | Backspace |
| 09 | HT | Horizontal Tab |
| 0A | LF | Line Feed |
| 0B | VT | Vertical Tabulation |
| 0C | FF | Form Feed |
| 0D | CR | Carriage Return |
| 0E | SO | Shift Out |
| 0F | SI | Shift In |
| 10 | DLE | Data Link Escape |
| 11 | DC1 | Device Control One (XON) |
| 12 | DC2 | Device Control Two |
| 13 | DC3 | Device Control Three (XOFF) |
| 14 | DC4 | Device Control Four |
| 15 | NAK | Negative Acknowledge |
| 16 | SYN | Synchronous Idle |
| 17 | ETB | End of Transmission Block |
| 18 | CAN | Cancel |
| 19 | EM | End of medium |
| 1A | SUB | Substitute |
| 1B | ESC | Escape |
| 1C | FS | File Separator |
| 1D | GS | Group Separator |
| 1E | RS | Record Separator |
| 1F | US | Unit Separator |
| Hex | Symbol | Description |
Control characters in ASCII code are those that do not represent a visible symbol on the screen, but are used to control devices, such as printers or text terminals. These characters perform specific functions, such as controlling the position of the cursor, starting a new line, or signaling the end of a file.
Range of numbers for control characters in ASCII
0 to 31: These are the first 32 characters of the ASCII code, used for various control functions.
Examples of ASCII code control characters
- 0 (NUL): Null character.
- 7 (BEL): Emits a bell or alert sound.
- 8 (BS): Backspace.
- 9 (TAB): Horizontal tabulation.
- 10 (LF): Line Feed.
- 13 (CR): Carriage Return.
- 27 (ESC): Escape character.
- Y el carácter 127 (DEL): It is the “delete” character.
These control characters are essential for communication and control of hardware and software devices, although they are not displayed as visible symbols on a screen.
Printable characters in Hexadecimal
(characters from 32 to 126)
| Hex | Symbol | Description |
|---|---|---|
| 20 | SP | Space |
| 21 | ! | Exclamation mark |
| 22 | “ | Double quotes (or speech marks) |
| 23 | # | Number sign |
| 24 | $ | Dollar |
| 25 | % | Per cent sign |
| 26 | & | Ampersand |
| 27 | ‘ | Single quote |
| 28 | ( | Open parenthesis (or open bracket) |
| 29 | ) | Close parenthesis (or close bracket) |
| 2A | * | Asterisk |
| 2B | + | Plus |
| 2C | , | Comma |
| 2D | – | Hyphen-minus |
| 2E | . | Period, dot or full stop |
| 2F | / | Slash or divide |
| 30 | 0 | Zero |
| 31 | 1 | One |
| 32 | 2 | Two |
| 33 | 3 | Three |
| 34 | 4 | Four |
| 35 | 5 | Five |
| 36 | 6 | Six |
| 37 | 7 | Seven |
| 38 | 8 | Eight |
| 39 | 9 | Nine |
| 3A | : | Colon |
| 3B | ; | Semicolon |
| 3C | < | Less than (or open angled bracket) |
| 3D | = | Equals |
| 3E | > | Greater than (or close angled bracket) |
| 3F | ? | Question mark |
| 40 | @ | At sign |
| 41 | A | Uppercase A |
| 42 | B | Uppercase B |
| 43 | C | Uppercase C |
| 44 | D | Uppercase D |
| 45 | E | Uppercase E |
| 46 | F | Uppercase F |
| 47 | G | Uppercase G |
| 48 | H | Uppercase H |
| 49 | I | Uppercase I |
| 4A | J | Uppercase J |
| 4B | K | Uppercase K |
| 4C | L | Uppercase L |
| 4D | M | Uppercase M |
| 4E | N | Uppercase N |
| 4F | O | Uppercase O |
| 50 | P | Uppercase P |
| 51 | Q | Uppercase Q |
| 52 | R | Uppercase R |
| 53 | S | Uppercase S |
| 54 | T | Uppercase T |
| 55 | U | Uppercase U |
| 56 | V | Uppercase V |
| 57 | W | Uppercase W |
| 58 | X | Uppercase X |
| 59 | Y | Uppercase Y |
| 5A | Z | Uppercase Z |
| 5B | [ | Opening bracket |
| 5C | \ | Backslash |
| 5D | ] | Closing bracket |
| 5E | ^ | Caret – circumflex |
| 5F | _ | Underscore |
| 60 | ` | Grave accent |
| 61 | a | Lowercase a |
| 62 | b | Lowercase b |
| 63 | c | Lowercase c |
| 64 | d | Lowercase d |
| 65 | e | Lowercase e |
| 66 | f | Lowercase f |
| 67 | g | Lowercase g |
| 68 | h | Lowercase h |
| 69 | i | Lowercase i |
| 6A | j | Lowercase j |
| 6B | k | Lowercase k |
| 6C | l | Lowercase l |
| 6D | m | Lowercase m |
| 6E | n | Lowercase n |
| 6F | o | Lowercase o |
| 70 | p | Lowercase p |
| 71 | q | Lowercase q |
| 72 | r | Lowercase r |
| 73 | s | Lowercase s |
| 74 | t | Lowercase t |
| 75 | u | Lowercase u |
| 76 | v | Lowercase v |
| 77 | w | Lowercase w |
| 78 | x | Lowercase x |
| 79 | y | Lowercase y |
| 7A | z | Lowercase z |
| 7B | { | Opening brace |
| 7C | | | Vertical bar |
| 7D | } | Closing brace |
| 7E | ~ | Equivalency sign – tilde |
| 7F | DEL | Delete |
| Hex | Symbol | Descripción |
Printable ASCII characters are those that can be represented visually on a screen or printer. These characters include letters, numbers, punctuation marks, and special symbols.
Range of numbers for printable characters in ASCII
These range from 32 to 126 and these are some examples:
- 32 (espacio): It is a white space character.
- 33-47: Punctuation marks and symbols (e.g. !, “, #, etc.).
- 48-57: Numeric digits (0-9).
- 58-64: More punctuation marks and symbols (e.g. :, ;, <, =, etc.).
- 65-90: Capital letters (A-Z).
- 91-96: Brackets and other symbols (e.g. [, \, ], ^, _, etc.).
- 97-122: Lowercase letters (a-z).
- 123-126: Braces and other symbols (eg. {, |, }, ~).
In total, there are 95 printable characters in the standard ASCII set.
Extended ASCII to Hexadecimal
(characters from 128 to 255)
| Hex | Symbol | Description |
|---|---|---|
| 80 | € | Euro sign |
| 81 | Unused | |
| 82 | ‚ | Single low-9 quotation mark |
| 83 | ƒ | Latin small letter f with hook |
| 84 | „ | Double low-9 quotation mark |
| 85 | … | Horizontal ellipsis |
| 86 | † | Dagger |
| 87 | ‡ | Double dagger |
| 88 | ˆ | Modifier letter circumflex accent |
| 89 | ‰ | Per mille sign |
| 8A | Š | Latin capital letter S with caron |
| 8B | ‹ | Single left-pointing angle quotation |
| 8C | Π| Latin capital ligature OE |
| 8D | Unused | |
| 8E | Ž | Latin capital letter Z with caron |
| 8F | Unused | |
| 90 | Unused | |
| 91 | ‘ | Left single quotation mark |
| 92 | ’ | Right single quotation mark |
| 93 | “ | Left double quotation mark |
| 94 | ” | Right double quotation mark |
| 95 | • | Bullet |
| 96 | – | En dash |
| 97 | — | Em dash |
| 98 | ˜ | Small tilde |
| 99 | ™ | Trademark symbol |
| 9A | š | Latin small letter S with caron |
| 9B | › | Single right-pointing angle quotation mark |
| 9C | œ | Latin small ligature oe |
| 9D | Unused | |
| 9E | ž | Latin small letter z with caron |
| 9F | Ÿ | Latin capital letter Y with diaeresis |
| A0 | NBSP | Non-breaking space |
| A1 | ¡ | Inverted exclamation mark |
| A2 | ¢ | Cent sign |
| A3 | £ | Pound sign |
| A4 | ¤ | Currency sign |
| A5 | ¥ | Yen sign |
| A6 | ¦ | Pipe, broken vertical bar |
| A7 | § | Section sign |
| A8 | ¨ | Spacing diaeresis – umlaut |
| A9 | © | Copyright sign |
| AA | ª | Feminine ordinal indicator |
| AB | « | Left double angle quotes |
| AC | ¬ | Negation |
| AD | SHY | Soft hyphen |
| AE | ® | Registered trademark sign |
| AF | ¯ | Spacing macron – overline |
| B0 | ° | Degree sign |
| B1 | ± | Plus-or-minus sign |
| B2 | ² | Superscript two – squared |
| B3 | ³ | Superscript three – cubed |
| B4 | ´ | Acute accent – spacing acute |
| B5 | µ | Micro sign |
| B6 | ¶ | Pilcrow sign – paragraph sign |
| B7 | · | Middle dot – Georgian comma |
| B8 | ¸ | Spacing cedilla |
| B9 | ¹ | Superscript one |
| BA | º | Masculine ordinal indicator |
| BB | » | Right double angle quotes |
| BC | ¼ | Fraction one quarter |
| BD | ½ | Fraction one half |
| BE | ¾ | Fraction three quarters |
| BF | ¿ | Inverted question mark |
| C0 | À | Latin capital letter A with grave |
| C1 | Á | Latin capital letter A with acute |
| C2 | Â | Latin capital letter A with circumflex |
| C3 | Ã | Latin capital letter A with tilde |
| C4 | Ä | Latin capital letter A with diaeresis |
| C5 | Å | Latin capital letter A with ring above |
| C6 | Æ | Latin capital letter AE |
| C7 | Ç | Latin capital letter C with cedilla |
| C8 | È | Latin capital letter E with grave |
| C9 | É | Latin capital letter E with acute |
| CA | Ê | Latin capital letter E with circumflex |
| CB | Ë | Latin capital letter E with diaeresis |
| CC | Ì | Latin capital letter I with grave |
| CD | Í | Latin capital letter I with acute |
| CE | Î | Latin capital letter I with circumflex |
| CF | Ï | Latin capital letter I with diaeresis |
| D0 | Ð | Latin capital letter ETH |
| D1 | Ñ | Latin capital letter N with tilde |
| D2 | Ò | Latin capital letter O with grave |
| D3 | Ó | Latin capital letter O with acute |
| D4 | Ô | Latin capital letter O with circumflex |
| D5 | Õ | Latin capital letter O with tilde |
| D6 | Ö | Latin capital letter O with diaeresis |
| D7 | × | Multiplication sign |
| D8 | Ø | Latin capital letter O with slash |
| D9 | Ù | Latin capital letter U with grave |
| DA | Ú | Latin capital letter U with acute |
| DB | Û | Latin capital letter U with circumflex |
| DC | Ü | Latin capital letter U with diaeresis |
| DD | Ý | Latin capital letter Y with acute |
| DE | Þ | Latin capital letter THORN |
| DF | ß | Latin small letter sharp s – ess-zed |
| E0 | à | Latin small letter a with grave |
| E1 | á | Latin small letter a with acute |
| E2 | â | Latin small letter a with circumflex |
| E3 | ã | Latin small letter a with tilde |
| E4 | ä | Latin small letter a with diaeresis |
| E5 | å | Latin small letter a with ring above |
| E6 | æ | Latin small letter ae |
| E7 | ç | Latin small letter c with cedilla |
| E8 | è | Latin small letter e with grave |
| E9 | é | Latin small letter e with acute |
| EA | ê | Latin small letter e with circumflex |
| EB | ë | Latin small letter e with diaeresis |
| EC | ì | Latin small letter i with grave |
| ED | í | Latin small letter i with acute |
| EE | î | Latin small letter i with circumflex |
| EF | ï | Latin small letter i with diaeresis |
| F0 | ð | Latin small letter eth |
| F1 | ñ | Latin small letter n with tilde |
| F2 | ò | Latin small letter o with grave |
| F3 | ó | Latin small letter o with acute |
| F4 | ô | Latin small letter o with circumflex |
| F5 | õ | Latin small letter o with tilde |
| F6 | ö | Latin small letter o with diaeresis |
| F7 | ÷ | Division sign |
| F8 | ø | Latin small letter o with slash |
| F9 | ù | Latin small letter u with grave |
| FA | ú | Latin small letter u with acute |
| FB | û | Latin small letter u with circumflex |
| FC | ü | Latin small letter u with diaeresis |
| FD | ý | Latin small letter y with acute |
| FE | þ | Latin small letter thorn |
| FF | ÿ | Latin small letter y with diaeresis |
| Hex | Symbol | Description |
The Extended ASCII code table is an extension of the standard ASCII set, which originally covered only the numbers 0 through 127. Extended ASCII uses values from 128 to 255, adding 128 additional characters, including symbols, accented letters, graphic characters, and others not in the standard ASCII set.
Range of numbers for extended ASCII characters
These range from 128 to 255.
- 128-159: These characters include several additional control symbols and special characters used on some systems. Many of these characters may vary depending on the code page (or character set) used.
- 160-255: This range includes accented characters (used in European languages), specific letters of some alphabets (such as Greek), mathematical symbols, simple graphics, and other special symbols.
Examples of characters in the extended ASCII table:
- Á (193): Capital letter A with acute accent.
- é (233): Lowercase letter e with acute accent.
- Ç (199): Capital letter C with cedilla.
- Ñ (209): Capital letter N with accent (used in Spanish).
- ß (223): Letter eszett or scharfes S (used in German).
- Ω (234): Letter omega (from the Greek alphabet).
- ¼ (188): Fraction one quarter.
- £ (163): Symbol of the pound sterling.
The new extended character set was created to meet the need to represent more characters, especially for different languages and graphical applications, but its interpretation may vary depending on the encoding used (e.g. Latin-1, Windows-1252, etc.).