Hmmmm, am I going to burst bubbles yet again? US passport pages are segmented into four parts per page...but only by lines.
After reading these posts, I pulled out my "phone booK" as that is what I call my passport, and reviewed all the entry stamps...14 of them, just to be sure. Ma'af, but all of those entry stamps seemed to me anyway, to be rather neatly positioned within an empty quadrant on any given page.
However, having run out of pages in my last passport, I found it very easy, and free indeed, to get additional pages from my consulate office. After all, that's what our taxes... :shock: ....pay for!