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How can we help? Search for a topic. ZIP Codes. Share via email. Information Article Number. Customer Information. City names that are abbreviated will frequently be listed as unacceptable because abbreviations are not an acceptable city name format. Not Acceptable or Unacceptable : Means an inadequate city name has been entered or received based on information entered.

Unique : Assigned to a company, government agency, or entity with sufficient mail volume, based on average daily volume of letter size mail received, availability of ZIP Code numbers in the postal area, and USPS cost-benefit analysis. Register your company and authorized users using Customer Registration.

Select the media type that you intend to use. Provide complete delivery information for the BRM mailpieces that will be returned. Submit your request. How can this problem be fixed? About ,, search results. To get your exact zipcode please share your location.

People also ask. The postal code for an address is usually listed as the last item in an address after the city and state. If a person needs to look up the postal code for an address USPS. Reference www. That means that if you want to know for sure what the exact ZIP Code of an address is all nine digits of it , you'll need access to the USPS address database where that information is kept.

And to get that, you'll need an address validation service. A 9-digit ZIP Code is made of two parts. The first part is the first five digits of the zip code which indicates the destination post office or delivery area. The 9-digit ZIP Code consists of two sections. The first five digits indicate the destination post office or delivery area. The last 4 digits represent specific delivery routes within delivery areas.

It helped divide the country into different "zones" according to how mail was distributed , which accelerated sorting and delivery. 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.