By the zip

ZIP "Zippy". They also released the ZIP Code jingle:. As the US population has increased and scattered since , it's been necessary to expand on the system, to make room for everybody and their dog. That's where the "plus 4" part comes in. We're getting ahead of ourselves, though, so let's start with the basics. If you're mailing a letter from Boston to Seattle, the mail carrier in Massachusetts doesn't really care what the street address of the destination is.

It's what you might call "outside his jurisdiction. A postal worker can only cover so much ground on a given day. And since the USPS has a standard of delivering in rain, sleet or snow, that rules out the possibility of doing the service of delivering in stages some today, some tomorrow.

That means that any given post office is only servicing what it can reach in a day. ZIP Codes reflect that. This included condos, co-ops and single- and two-family homes. A Zip code was only included if there were three transactions over the measured period. The data show a cluster of extremely expensive Zip codes around Los Angeles and San Francisco, each with three of the top Atherton, near San Francisco, has the most expensive Zip code for the fifth year in a row.

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Sign me up Stay informed about special deals, the latest products, events, and more from Microsoft Store. Sign up. ZIP codes don't usually cross state lines, but some do , , and are good examples. The edges of the boundaries commonly overlap. For the purposes of our free zip code database by county downloads, we will commonly list either the most common region for the ZIP code or list multiple regions if several exist in the ZIP code.

For cities, the assignment is somewhat more complicated. The assignment of cities to ZIP codes is more general. The city is usually the name of the main post office. For instance, almost all ZIP codes in St. Louis County in Missouri have a city of Saint Louis when they may be more accurately described as the name of a smaller city where they are located. Click here to learn more about matching ZIPs to cities and counties. Toggle navigation. Search by ZIP, address, city, or county:.

Featured In. Remote and especially rural areas of the country do not have enough deliverable addresses to create a mail route.