A couple of weeks ago I was in New York City, and I needed to buy a MetroCard from a vending machine at the entrance of a subway station. I stick my credit card (issued by a major Australian bank) into the machine. I proceed to pay. Then it asks me for my ZIP code. Living in Australia, I don't have a US ZIP code, but I do have a four digit Australian postal code. I try entering my four digit Australian postal code – it doesn't accept it, wrong number of digits. So then I just try 90210. That works, it processes the transaction and gives me the MetroCard.
> A titanium, laser‑etched, Apple‑designed credit card. And Mastercard is our global payment network, so you can use it all over the world. For apps and websites, there’s a virtual card number in the Wallet app. It autofills for you when you’re using Safari
From the linked page:
"For apps and websites, there’s a virtual card number in the Wallet app. It autofills for you when you’re using Safari."