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Re: Credit card numbers

  Hi guys,
    Long time no post. Credit card numbers are determined by 
algorithmns.If s credit card number is no fitting to that algorithmn it 
is phoney. The only way that I know of to determine the validity of the 
card if a person has a copy of underground algorithmn generating software 
is to use the voice number and a store acct # for a purchase of say 
$50.00 or to go through the credit bureau.What I have wondered is if 
there is a way to determine a experation date from the credit card number.
                          Bye
                               moroni








On Tue, 20 Feb 1996, Jens Thiel wrote:

> Is there something like a checksum attached to Credit Card
> Numbers. Or better: Is there a way to determine for a given
> number N if
>   -this _might_ be a valid number
>   -this can't be a valid number
> 
> Thanx,
> Jens.
> -- 
> mailto:[email protected]
> Fax: +49 228 747246
> http://www.Bonn.CityNet.DE/people/jens
> 
>