Column / field definition

Hi Everyone,
I am having some sort of argument with data management where I work and would like some opinions or maybe I am missing something new or not in Oracle database design.
I have a field which can only contains numbers, such as a telephone number I guess. Data management is forcing me to define the field as a number within the Oracle database because the field can only contains digits.
However, unless I am missing something, Oracle will store both numbers 00371 and 371 as 371 in the database. When I display the value on the screen, the number will always show up as 371 unless I put a format mask to show leading zeros which will then fill the number with leading zeros up to the maximum length for the field.
But to the user, numbers 371, 0371, 00371 are all different "file" numbers. Therefore, they would like to be able to enter and see numbers 371, 0371 or 00371 when they enter it so that they can relate it to another file system they are accessing.
The only solution I can see is to define the column in the database as character and not number. Unless Oracle can store and see numbers 371, 0371 and 00371 as different numbers ? Is that the case (which I really doubt unless I am missing a new concept on numbers) ?
Even then, Oracle Forms seem to always consider 00371, 0371 and 371 as the same number.
What would you do ?
The question may sound obvious but it doesn't seem to the DM group here.
Thank you for your opinions.

Just because a data item consists of only numeric digits does not make it a number. A number is a data item that is subject to use in mathematical operations such as addition, substraction, multiplication, division, raising to a power, taking a root of, or supplied as input to a mathimatical function such as SIN, LOG, etc....
Just because something is referred to as a number in its name does not make the value a true number, think department number, part number, etc... where the value might actually have alpha-numeric characters.
If your phone number field only stores US phone numbers then a formatting routine can probably be devised to handle proper storage and retrieval of the number but if the column may also be used to hold an international phone number the use of a number datatype is really going to complicate any such routine.
HTH -- Mark D Powell --

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