Why do zip codes change




















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?

No Labels Customer Information 2. Customer Information 3. Customer Information 4. Customer Information 5. Any proposal for change must be submitted in writing to the district manager. The district manager is to work with the local postal managers, headquarters delivery, and headquarters Address Management System to evaluate the request and determine if an accommodation can be made. If a district manager rejects the request, the process provides for an appeal to the manager of delivery at USPS headquarters, where a review based on whether or not a "reasonable accommodation" was made is to be provided within 60 days.

Constituents often turn to members of Congress for assistance in securing changes to ZIP Code boundaries, usually because their mailing addresses do not correspond to the geographic and political boundaries of their municipalities' jurisdictions. This report explains why ZIP Code boundaries often are not aligned with geographic political jurisdiction boundaries, describes some problems that may occur because of the misalignment, and discusses efforts by the U.

The Post Office Department now the U. Postal Service began dividing large cities into delivery zones in , inserting two digits between the city and the state in the lower address line. These codes corresponded to the post offices where final sorting of mail was done and from which letter carriers were dispatched to make deliveries.

Almost all mail is sorted by machines, and the basis for this sorting is a ZIP Code. Most customers know only their five-digit ZIP Codes. The first number in the ZIP Code represents a general geographic area of the nation—moving from a "0" for places in the east to a "9" for locations in the west. The 9 directs the mail to the west. The 61 directs mail to the processing facility in Reno, NV, which is the distribution point for some California post offices such as Alturas, Cedarville , Fort Bidwell , and Likely The four final ZIP Code numbers, which were added in "allow mail to be sorted to a specific group of streets or to a high-rise building.

The Postal Service has contended that the ZIP Code system's only purpose is to facilitate the efficient and orderly delivery of the mail. Nevertheless, ZIP Code information is readily available to the public, and both private and governmental entities have found it a convenient and accessible tool for many purposes unrelated to mail delivery.

The ZIP Code also has been adopted for non-delivery purposes, such as providing a convenient, yet sometimes imperfect means of targeting populations for performing demographic research, setting insurance rates, estimating housing values, remitting state tax revenues back to localities, and directing advertising messages.

USPS works with state and local authorities as well as private companies to better align ZIP Codes with both postal and non-postal needs. Because ZIP Codes are based on the location of delivery post offices, they often do not correspond to political jurisdiction boundaries. This means that millions of Americans receive their mail from post offices in adjacent towns, villages, or neighborhoods. Their mailing addresses may not reflect the name and ZIP Code of the jurisdictions where they actually live.

This situation was not uncommon when ZIP Codes were first assigned nearly 50 years ago, and it has become more common since then—particularly in rapidly growing suburban areas.

The boundaries of many jurisdictions have changed with growth, annexation, and the incorporation of new communities. At the same time, USPS has sought to reduce rather than expand the number of post offices as its retail business model has changed. The widespread use of ZIP Codes for non-postal purposes has exacerbated problems for those postal patrons whose mailing addresses do not match their actual towns or cities of residence.

The following is a sample of the problems that have been brought to congressional attention:. In addition, a community may lack a delivery post office and complain that the need to use mailing addresses from neighboring towns robs them of their community identity.

For example, even though Haddon Township, NJ, is an incorporated municipality with a estimated population of 14, people, 3 it has no delivery post office, and its residents receive mail from the Camden, Haddonfield, Gloucester City, and Mount Ephraim post offices—each with a different ZIP Code. A host of ZIP Code misalignment problems were aired in a hearing of a House postal subcommittee.

The hearing in the st Congress considered three bills H. USPS expressed strong opposition to these bills and said that depriving USPS of control over "the most basic tool of the postal trade—the mailing address" would be "disastrous. At of the end of , of the 1, possible three-digit combinations already had been assigned; in 20 areas, 90 or more of the possible ZIP Codes already had been assigned; and in Houston, all possible ZIP Codes had been used.

These arguments may have proved persuasive because the legislation never advanced, and neither have similar bills introduced in later Congresses. At the hearings, however, USPS also earned some criticism because of its "peremptory denials" of local suggestions or requests for ZIP Code changes that were variously characterized as "cold and haughty," "cursory," "unresponsive," "stonewalling," and "uncaring.

GAO reported that USPS not only could do a better job of providing facts and reasoning to explain its decisions in individual change requests, but also could "do more to USPS has established criteria and thresholds for ZIP Code changes, which include, but are not limited to, the establishment of 25, new deliveries 13 or more than 55 carrier routes.

One of the questions a manager of the District Office's AMS must address, however, is whether municipal boundaries will be crossed. The manager must also consider whether municipal officials have been asked to comment on the revised boundaries. The new boundary review process requires that "officials should consider municipal boundaries and customer interests in all zone splits. Initially, the zip code was only a two-digit number: the first denoted the city, the second denoted the state.

But as the need for delivery expanded, so did the concept of the zip code. As of , zip codes' numbers are determined by a few factors: the area, the regional postal facility and the local zone. The first number of the five-digit code signifies the region which the address is located in, a number that grows from the east coast to the west. For example, Eastern states such as Maine and New York begin with 0 or 1, whereas the Western states of California and Washington begin with a 9.

The second two digits in the code determine a smaller region within each initial area that translates to a central post office facility for that area. The final two digits signify the local post office of the address.



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