The remaining 80 percent of seats are awarded based on grades and ZIP codes, with the largest number going to the neighborhood with the greatest proportion of the city’s school-age children.

The block south, also within that unique ZIP code, includes library offices. Likewise, 98174 applies exclusively to the Henry M. Jackson Federal Building at 915 Second Avenue, ...

In the ZIP code 22207, serif addresses vastly outnumber sans serif addresses, 7,759 to 2,111. Many blocks feature no sans serif houses at all, or just one or two.