From: Raj Sahae <rajsahae@...>
Date: 2007-04-28T13:44:47+09:00
Subject: Re: [QUIZ] Checking Credit Cards (#122)

Mark Day wrote:
> On Apr 27, 2007, at 8:39 PM, Raj Sahae wrote:
>
>> Tim Becker wrote:
>>>> For completeness and to make this Quiz exercise valid to more people,
>>>> can anyone include the information for other major credit cards from
>>>> major countries? Japan: JCB,  et. al., U.K.: Barclay, et. al. , etc...
>>>
>>> UK had Switch and Solo till recently which are now rebranded under the
>>> Maestro umbrella. They're not really credit cards and basically no
>>> rules exist, you have to check tables to determine valid prefixes and
>>> card number length. Additionally, Maestro card numbers may also be
>>> Mastercard numbers, so they can't be uniquely identified as being
>>> Maestro.
>>>
>>> For JCB and Diner's:
>>>
>>> JCB       3528-2589  Length: 16
>>> Diners   3000-3029, 3040-3059, 36, 3815-3889, 389 Length: 14
>>>
>> There's no way to differentiate between a JCB starting with 34 and an 
>> American Express card that starts with 34 given those starting numbers.
>
> Tim corrected his typo:
>
>>> > JCB       3528-2589  Length: 16
>>
>> should be 3528-3589, obviously.
>
> So I don't think a leading 34 is ambiguous.  It would be American 
> Express, with an expected length of 15 digits.
>
> -Mark
>
Sorry, didn't see that email for some reason, even though it's right 
here in my inbox. . .

Raj