I work in a call center and US residents call us and we sell them Internet service. Is the earning allowed in cases when we don't know and we don't ask them how they are going to use it. And what if they say they are going to use it for watching Netflix?
Bismihi ta'ala
Yes, you would be permitted to work there, and the income is halal, and it does not concern you what they use it for, and how. Netflix is also not haram. It all depends on how it is used, and what is watched, by the individual.
And Allah knows best.