Decimal | Octal | Hex | Value              Decimal | Octal | Hex | Value     Decimal | Octal | Hex | Value
========+=======+=====+================    ========+=======+=====+=======    ========+=======+=====+=======
    0   |  000  |  00 | Null                  60   |  074  |  3C | <            96   |  140  |  60 | `
    7   |  007  |  07 | Bell                  61   |  075  |  3D | =            97   |  141  |  61 | a
    8   |  010  |  08 | Backspace             62   |  076  |  3E | >            98   |  142  |  62 | b
    9   |  011  |  09 | Tab                   63   |  077  |  3F | ?            99   |  143  |  63 | c
--------+-------+-----+----------------    --------+-------+-----+-------    --------+-------+-----+-------
   10   |  012  |  0A | Line Feed             64   |  100  |  40 | @           100   |  144  |  64 | d
   13   |  015  |  0D | Carriage Return       65   |  101  |  41 | A           101   |  145  |  65 | e
   24   |  030  |  18 | Cancel                66   |  102  |  42 | B           102   |  146  |  66 | f
   27   |  033  |  1B | Escape                67   |  103  |  43 | C           103   |  147  |  67 | g
--------+-------+-----+----------------    --------+-------+-----+-------    --------+-------+-----+-------
   32   |  040  |  20 | Space                 68   |  104  |  44 | D           104   |  150  |  68 | h
   33   |  041  |  21 | !                     69   |  105  |  45 | E           105   |  151  |  69 | i
   34   |  042  |  22 | "                     70   |  106  |  46 | F           106   |  152  |  6A | j
   35   |  043  |  23 | #                     71   |  107  |  47 | G           107   |  153  |  6B | k
--------+-------+-----+----------------    --------+-------+-----+-------    --------+-------+-----+-------
   36   |  044  |  24 | $                     72   |  110  |  48 | H           108   |  154  |  6C | l
   37   |  045  |  25 | %                     73   |  111  |  49 | I           109   |  155  |  6D | m
   38   |  046  |  26 | &                     74   |  112  |  4A | J           110   |  156  |  6E | n
   39   |  047  |  27 | '                     75   |  113  |  4B | K           111   |  157  |  6F | o
--------+-------+-----+----------------    --------+-------+-----+-------    --------+-------+-----+-------
   40   |  050  |  28 | (                     76   |  114  |  4C | L           112   |  160  |  70 | p
   41   |  051  |  29 | )                     77   |  115  |  4D | M           113   |  161  |  71 | q
   42   |  052  |  2A | *                     78   |  116  |  4E | N           114   |  162  |  72 | r
   43   |  053  |  2B | +                     79   |  117  |  4F | O           115   |  163  |  73 | s
--------+-------+-----+----------------    --------+-------+-----+-------    --------+-------+-----+-------
   44   |  054  |  2C | ,                     80   |  120  |  50 | P           116   |  164  |  74 | t
   45   |  055  |  2D | -                     81   |  121  |  51 | Q           117   |  165  |  75 | u
   46   |  056  |  2E | .                     82   |  122  |  52 | R           118   |  166  |  76 | v
   47   |  057  |  2F | /                     83   |  123  |  53 | S           119   |  167  |  77 | w
--------+-------+-----+----------------    --------+-------+-----+-------    --------+-------+-----+-------
   48   |  060  |  30 | 0                     84   |  124  |  54 | T           120   |  170  |  78 | x
   49   |  061  |  31 | 1                     85   |  125  |  55 | U           121   |  171  |  79 | y
   50   |  062  |  32 | 2                     86   |  126  |  56 | V           122   |  172  |  7A | z
   51   |  063  |  33 | 3                     87   |  127  |  57 | W           123   |  173  |  7B | {
--------+-------+-----+----------------    --------+-------+-----+-------    --------+-------+-----+-------
   52   |  064  |  34 | 4                     88   |  130  |  58 | X           124   |  174  |  7C | |
   53   |  065  |  35 | 5                     89   |  131  |  59 | Y           125   |  175  |  7D | }
   54   |  066  |  36 | 6                     90   |  132  |  5A | Z           126   |  176  |  7E | ~
   55   |  067  |  37 | 7                     91   |  133  |  5B | [           127   |  177  |  7F | Delete
--------+-------+-----+----------------    --------+-------+-----+-------    --------+-------+-----+-------
   56   |  070  |  38 | 8                     92   |  134  |  5C | \
   57   |  071  |  39 | 9                     93   |  135  |  5D | ]     
   58   |  072  |  3A | :                     94   |  136  |  5E | ^     
   59   |  073  |  3B | ;                     95   |  137  |  5F | _     
--------+-------+-----+----------------    --------+-------+-----+-------
                                                                                 
================================================================================

To convert ASCII to EBCDIC (ascii to ebcdic) or vice-versa.
   dd if=ascii.file  of=ebcdic.file conv=ebcdic
or dd if=ebcdic.file of=ascii.file  conv=ascii

================================================================================

             A S C I I           See also my Windows keyboard sequences notes
             =========           for details on how to enter special characters.
      Hex |0123 4567 89AB CDEF   And here for the HTML entities.
      ====+==== ==== ==== ====
        0 |                   
        1 |                   
        2 | !"# $%&' ()*+ ,-./
        3 |0123 4567 89:; <=>?
        4 |@ABC DEFG HIJK LMNO
        5 |PQRS TUVW XYZ[ \]^_
        6 |`abc defg hijk lmno
        7 |pqrs tuvw xyz{ |}~