9 digit zip code
Normally, we use the 5-digit zip code in the US, But, sometimes, you may have a list of 9-digit zip codes, how could you convert the 9-digit zip codes to 5-digit short zip codes in Excel?
With over 50 unique fields of information and every 9 digit ZIP Code in the United States, it gives you an unlimited number of ways to analyze all the U. But Mr. But how does the ZIP code itself work?
Area ZIPs seem to start similarly, so the numbers must mean something, right? Of course! The four-digit ZIP was rolled out in to help the postal service sort mail faster. That said, if you have the extra digits, use them!
They really will help your mail reach its destination a bit faster. Think of the five-digit ZIP code as knowing you have to go to Fenway Stadium but not knowing which part exactly.
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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. Despite the fact that ZIP codes seem to be geographic in nature, that wasn't their intended purpose. They are intended to group mail to allow the USPS to deliver mail more efficiently. Some ZIP codes will span multiple states in order to make mail routing and delivery more efficient.
In most cases, addresses in close proximity to each other are grouped in the same ZIP code which gives the appearance that ZIP codes are defined by a clear geographic boundary. However, some ZIP codes have nothing to do with geogaphic areas.
When ZIP codes appear to be geographically grouped, a clear shape cannot always be drawn around the ZIP code because ZIP codes are only assigned to a point of delivery and not the spaces between delivery points.
In areas without a regular postal route or no mail delivery, ZIP codes may not be defined or have unclear boundaries.
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