The service closed in when telegraph lines connecting the coasts were finished being laid, allowing people to send information much faster and cheaper than they could by Pony Express. The history of the United States Post Office is filled with fascinating data and amusing facts. Did you know the first Post Office in the United States was actually a tavern? Or that the United States employed camels to deliver mail over deserts in the Southwest?
Or that one of the first airmail deliveries involved a three mile flight, and that the pilot dropped the bag of mail from the flying plane to a postmaster waiting below?
ZIP Code. Zip or Mr. And just what are ZIP Codes? And how does the United States Post Office use them? What do the numbers stand for?
Where does the ZIP code data come from? ZIP codes near me are shown on the map above. The additional 4 digits help USPS more precisely group mail for delivery. The map of the first digit of zip codes above shows they are assigned in order from the north east to the west coast.
The first 3 digits of a ZIP code determine the central mail processing facility, also called sectional center facility or 'sec center', that is used to process and sort mail. All mail with the same first 3 digits is first delivered to the same sec center where it is sorted according to the last 2 digits and distributed to local post offices.
The sec centers are not open to the public and usually do most sorting overnight. As you can see from the map of the first 3 digits of zip codes, the digits after the first are also generally assigned from east to west. In the map, 0 is closer to white and 9 is much more vivid. It's easy to follow the gradient across each of the zones even though there are a few exceptions such as the southwest tip of Georgia which uses 39XXX like central Mississippi.
In the United States of America a zipcode is five or nine numbers that are added to a postal address to assist the sorting of mail. There are currently about 43, zipcode. This tool can also find the postal code of many other countries. Postal codes vary from one country to another but they are usually a group of numbers between 3 and 10 digits long. In some countries such as the United Kingdom and Canada, postal code are comprised of number and letters. Toggle navigation Map Developers.
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. Typically, a ZIP Code is tied to a post office; by that we mean, every one of the latter has one of the former. You might think of ZIP Codes as a mailing address for a particular post office.
Some do handle more than one ZIP Code, but a one-on-one game plan is the norm. It's very important to note that ZIP Codes aren't "boundaries. They don't follow geographic or administrative boundary lines; they can cross city, county, or even state lines. They follow where the delivery trucks go. Some ZIP Codes are special cases. Among them are "military" ZIP Codes, which include everything from military bases domestic or otherwise to battleships at sea.
If you are getting very precise usually a matter of meters, not miles , census block boundaries near the edge of a ZIP code almost always split ZIP codes. The statistics provided by the Census Bureau can give insight into the demographics within the ZIP code.
For instance, see our ZIP code rankings. Remember that ZIP codes were made to make mail delivery easier. They weren't made to correspond to existing boundaries such as cities, counties, or even states. If it is more efficient for a mail carrier to drive across a state line to deliver mail, the ZIP code "boundary" will cross the state lines.
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.
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