The first four are not secrets. The first two digits identify the card issuer, a... | Hacker News

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		malfist on Feb 23, 2024 \| parent \| context \| favorite \| on: Thanks FedEx, this is why we keep getting phished The first four are not secrets. The first two digits identify the card issuer, and the next two are the card type. That's how those credit card numbers can show you your card issuer's logo after you type the first two characters.

lights0123 on Feb 23, 2024 [–]

Right—they're saying it would be easy for a scammer to "prove legitimacy" by showing those first four, given that they're public.

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