ZIP+4 Code™ Lookup Tool & Extra 4 Digits of ZIP Codes Explained (2024)

FAQs

ZIP+4 Code™ Lookup Tool & Extra 4 Digits of ZIP Codes Explained? ›

A ZIP+4 Code is a 4-digit code appended to a standard 5-digit ZIP that helps the USPS sort, route, and deliver mail more efficiently. The last 4 digits of these 9-digit ZIP Codes usually represent 6-20 delivery points on a USPS carrier route.

A ZIP+4 Code uses the basic five-digit code plus four additional digits to identify a geographic segment within the five-digit delivery area, such as a city block, a group of apartments, an individual high-volume receiver of mail, a post office box, or any other unit that could use an extra identifier to aid in ...

The segment can be a city block, a group of apartments or other mail receiving units that could benefit from the use of an additional identifier. An example of a ZIP+4 ZIP code is 99577-0727.

The last four digits, 9998, refer to a specific block, range of addresses, or building within the 10118 ZIP code area. This helps the USPS sort and deliver mail more accurately and efficiently. This ensures that your letter is delivered to the correct location with maximum efficiency.

What is a zip+4 code, and how is it different from a 5 digit zip code? A more detailed mailing code consisting of the original 5 zip code digit followed by a hyphen and four additional digits. These digits identify a specific geographic segment in delivery area.

So what do the extra numbers mean? These last 4 digits represent specific delivery routes within delivery areas. This extra detail means an even more precise matching to a more granular level. It could represent a handful of houses on one side of a street, or even a single building that receives a high volume of mail.

A ZIP+4 Code is a 4-digit code appended to a standard 5-digit ZIP that helps the USPS sort, route, and deliver mail more efficiently. The last 4 digits of these 9-digit ZIP Codes usually represent 6-20 delivery points on a USPS carrier route.

Whenever postal carriers have access to more information, the likelihood of a package or piece of mail landing in the proper mailbox significantly increases. The correct ZIP+4 decreases the number of times a piece of mail is handled, too. This means that misdelivery or error is significantly reduced as a result.

POSTNET (Postal Numeric Encoding Technique) is a barcode symbology used by the United States Postal Service to assist in directing mail. The ZIP Code or ZIP+4 code is encoded in half- and full-height bars. Most often, the delivery point is added, usually being the last two digits of the address or PO box number.

ZIP codes in the USA have five numbers and no letters - and some have five digits, a hyphen, then four more digits, in this format: ##### or #####-#### (five or nine digits). The first five digits are essential, while the additional four digits offer more precise location information.

What does each digit in a zip code mean? ›

The first three digits of a ZIP code correspond to the central mail processing facility used to sort the mail. The last two determine how the mail is sorted and then later delivered to post offices, according to unitedstateszipcodes.org. The first digit of a ZIP code identifies the state where the mail is being sent.

the required number of ways in which four digit numbers can be formed from the given digits is 9×9×8×7=4536.

What is a credit card ZIP code or postal code? A credit card ZIP code is the 5-digit zip code from your U.S. billing address. When you make a purchase, the ZIP code you enter must match the ZIP code associated with your official cardholder address.

The function of the ZIP + 4^® is to indicate a more specific area within a ZIP Code™, including the side of the street on which the building is located. The ZIP + 4^® enables mail to arrive faster, as it reduces the need for human interaction in a mail center.

Thus, by multiplication principle, the required number of 4-digit numbers is 9×504=4536.

Answer and Explanation:

There are 100,000 possible 5-digit zip codes if digits can be repeated. For each of the 5 digits of the zip code, there are 10 possible digits we can use (0, 1, 2, 3, 4, 5, 6, 7, 8, 9).

The five digits actually have specific functions: the first number in the code represents a general geographic area of the nation, “0” in the East, moving to “9” in the West. The next two numbers represent regional areas, and the final two identify specific Post Offices™.

What each number means. The first digit designates a broad area, which ranges from zero for the Northeast to nine for the far West. The two following digits are the code of a central post office facility in that region. The last two digits designate small post offices or postal zones.