Hi! Thank you for your reply.
My husband applied online and when we received NOA1 letter, it doesn’t say which service center it came from. How would we see which visa center our application went to?
I’m in Japan but last year when I saw someone’s time line on blog, she got NOA 2 within like 6months so I didn’t think time period between NOA1 & NOA2 be so long. Do you think it changes recently that takes longer than before?