Non immigrant Visa Number for I 485

[rajNs]

My spouse just came on fiance visa. He has I-94 on his arrival in US. We just got married last week. So I was filling I 485 for him.

What do I fill in for Non immigrant Visa Number for I 485 ?

Also what is the A# ?

I am in the state of Virginia can anyone confirm the address where I need to file this :
U.S. Citizenship and Immigration Services
P.O. Box 805887
Chicago, IL 60680-4120

Thanks in advance