American National Standard Code for Information Interchange の略。情報交換用米国標準コード。標準ASCIIでは7ビットで米国英語の大文字・小文字、数字、区切り記号、特殊制御文字を表します。拡張ASCIIでは8ビットで128種類の特殊記号、英字以外の文字およびグラフィック記号を表します。
推奨MIME名(Preferred MIME Name)はUS-ASCII。
| コード | 文字 |
|---|---|
| 00 | NUL (null) |
| 01 | SOH (start of heading) |
| 02 | STX (start of tex) |
| 03 | ETX (end of text) |
| 04 | EOT (end of transmission) |
| 05 | ENQ (enquiry) |
| 06 | ACK (acknowledge) |
| 07 | BEL (bell) |
| 08 | BS (backspace) |
| 09 | TAB (horizontal tab) |
| 0A | LF (line feed) |
| 0B | VT (vertical tab) |
| 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 1) |
| 12 | DC2 (device control 2) |
| 13 | DC3 (device control 3) |
| 14 | DC4 (device control 4) |
| 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) |
| 20 | 空白 |
| 21 | ! |
| 22 | " |
| 23 | # |
| 24 | $ |
| 25 | % |
| 26 | & |
| 27 | ' |
| 28 | ( |
| 29 | ) |
| 2A | * |
| 2B | + |
| 2C | ' |
| 2D | - |
| 2E | . |
| 2F | / |
| 30 | 0 |
| 31 | 1 |
| 32 | 2 |
| 33 | 3 |
| 34 | 4 |
| 35 | 5 |
| 36 | 6 |
| 37 | 7 |
| 38 | 8 |
| 39 | 9 |
| 3A | : |
| 3B | ; |
| 3C | < |
| 3D | = |
| 3E | > |
| 3F | ? |
| 40 | @ |
| 41 | A |
| 42 | B |
| 43 | C |
| 44 | D |
| 45 | E |
| 46 | F |
| 47 | G |
| 48 | H |
| 49 | I |
| 4A | J |
| 4B | K |
| 4C | L |
| 4D | M |
| 4E | N |
| 4F | O |
| 50 | P |
| 51 | Q |
| 52 | R |
| 53 | S |
| 54 | T |
| 55 | U |
| 56 | V |
| 57 | W |
| 58 | X |
| 59 | Y |
| 5A | Z |
| 5B | [ |
| 5C | \ |
| 5D | ] |
| 5E | ^ |
| 5F | _ |
| 60 | ` |
| 61 | a |
| 62 | b |
| 63 | c |
| 64 | d |
| 65 | e |
| 66 | f |
| 67 | g |
| 68 | h |
| 69 | i |
| 6A | j |
| 6B | k |
| 6C | l |
| 6D | m |
| 6E | n |
| 6F | o |
| 70 | p |
| 71 | q |
| 72 | r |
| 73 | s |
| 74 | t |
| 75 | u |
| 76 | v |
| 77 | w |
| 78 | x |
| 79 | y |
| 7A | z |
| 7B | { |
| 7C | | |
| 7D | } |
| 7E | ~ |
| 7F | DEL (delete) |