Does any one recognize this binary data storage format

[Christopher Subich]

geskerrett at hotmail.com wrote:
> I am hoping someone can help me solve a bit of a puzzle.
> 
> We are working on a data file reader and extraction tool for an old
> MS-DOS accounting system dating back to the mid 80's.
> 
> In the data files, the text information is stored in clearly readable
> ASCII text, so I am comfortable that this file isn't EBCIDIC, however,
> the some of the numbers are stored in a format that we can't seem to
> recognize or unpack using the standard python tools (struct, binascii)
> ... or or atleast our understanding of how these tools work !
> 
> 
> Any assistance would be appreciated.
> 
> Here are a few examples of telephone numbers;
> 
> Exmaple 1:
> 
> Phone 1: 5616864700
> Hex On Disk: C0DBA8ECF441
> 
> Phone 2: 5616885403
> Hex on Disk: B0E9ADECF4F1

Is this value a typo instead of ...F441?