Postal address? No, but I do know (for example) I'm on Main street, in that tiny alley one block west of 4th Ave, in the building just left of that weird giant sculpture of a bird.
I'm constantly aware of and can describe my relative location, even if I'm not always capable of expressing it using an absolute designation like postal address.
On the web, though, there is no such relativity. One website is not near or far from or above or below another. I cannot conceive of my location, much less express it, in any way but absolute address.
So: since I do not travel to reach places on the web, how do I know where I am? The address bar.