Did you know the first three digits of your social security number signify the state in which the card was issued? It’s usually the state in which you were born, though if you lose your card and have to get a new one I’d imagine the numbers would be different.

So, about Marco’s social security number…according to numerous sources, the 900 start code is reserved for ITIN numbers–Google “difference between ITIN and SSN”, and you get this definition:

Guys. Guys.

Marco might not have been born in America

(coughcough possibly canon immigrant protagonist hell yeah)