What is the meaning of the groupings of numbers on a credit card? There are four groups of numbers?
Answer:
one is the banks id no, one of them is the id for the issuer(visa,mastercard etcetc), next i think the state(route), next the person(you). I know this is not the exact answer, but we learnt something like this in school.(the order isnt exact )
Honestly I think they split them into groups of 4 to make them easier to read. The very first digit is an indicator. For example, visa cards begin with a 4.
My best guess is that the groupings make it easier to communicate the very long card number with fewer errors. Thats why we break phone numbers and social security/social insurance numbers into groupings although sections of the groupings may pertain to a generalization in some instances. A certain dour digits may correspond to Mastercard and a different set to Visa, just as the first three digits in a social security number reference the state you were born in.
Excellent question, by the way.
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