phone system:

local or national:
national prefix 0
area code -- or ---
restnumber
(8 to I0 digits)
example ?

international
different from world standard !
(IDD Int Direct Dial): 00I
or 0033 or 004I or 006I or 007I
or 0075 or 0078 or 0082

example:
calling from Japan
to France

00I 33 I 422I IIII
or 0033 33 I 422I IIII
or 004I 33 I 422I IIII
II rue des IIaIIes
PARIS Ier

phone information
national
international

Emergency ?
Police ?
Fire ?

calling into Japan
+ 8I
  - (areacode)
  -- -- -- -- (number)
(always 8 to I0 digits)