ZIP+4™ Codes Lookup by Address | What It Is & How to Find It (2023)

ZIP+4™ Codes Lookup by Address | What It Is & How to Find It (1)

ZIP+4 Codes (ZIP Plus 4 Codes) are the final 4 digit codes of full 9-digit ZIP Codes. 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.

ZIP plus 4 codes assist the USPS in effectively sorting and distributing mail.

9-digit Full ZIP Code Lookup by Address

We make it easy to perform a USPS full ZIP+4 Code lookup by address. Choose your option below to find your ZIP+4 Code.

Enter an address to lookup the specific ZIP+4 Code.Lookup several ZIP+4 Codes at once with the Bulk Tool.Lookup ZIP+4 Codes programmatically using our API.

ZIP+4 Lookup

API ZIP+4 Lookup

In this article we'll cover:

  • How do I Find My ZIP+4 Code by Address?
  • How ZIP+4 Codes Are Used
  • What Are Five-Digit ZIP Codes?
  • ZIP Code + 4 Meaning
  • Full ZIP+4 Code Lookup Benefits
  • ZIP+4 Code Database
  • Conclusion

How to Find My ZIP+4 Code by Address

You can easily find out your own ZIP+4 last 4-digits by watching this video which shows you how to do itin under a minute.

How Full ZIP Codes Are Used

Knowing what the last four digits of ZIP Codes are all about requires knowing what ZIP Codes themselves are all about. The Zone Improvement Plan wassomething that the USPS came up with to make it easier to ship letters and packages across the country.It helped divide the country into different "zones" according to how mail wasdistributed, which accelerated sorting and delivery.

(Video) What Is A Zip Code: Zip Codes Explained & What Each Number Means

At the same time that the Post Office Department launched the Zone Improvement Plan on July 1, 1963 theyalso introduced the world to Mr. ZIP "Zippy". Zippy is the official ZIP Code mascot pictured on our ZIP Codes 101 page. They also released the ZIP Code jingle:

As the US population has increased and scattered since 1963, 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'regetting ahead of ourselves, though, so let's start with the basics.

USPS Five-Digit ZIP Codes

ZIP+4™ Codes Lookup by Address | What It Is & How to Find It (2)

These are the codes you're familiar with.

They look like this…

…and most commonly indicate a destination post office. Here's why:

If you're mailing a letter from Boston to Seattle, the mail carrier in Massachusetts doesn'treallycare what the street address of the destination is. It's what you might call "outside hisjurisdiction." Hejust needs to know which mail carrier to send it to so the other carrier can get it to that address.

(Video) Informed Delivery by USPS | See your Mail in your Email for FREE

A postal worker can only cover so much ground on a given day. And since the USPS has a standard ofdelivering inrain, sleet or snow, that rules out the possibility of doing the service of delivering in stages (sometoday,some tomorrow). That means that any given post office is only servicing what it can reach in a day. ZIPCodesreflect that.

Typically, a ZIP Code is tied to a post office; by that we mean, every one of the latter has one of theformer.You might think of ZIP Codes as a mailing address for a particular post office. Some do handle more than oneZIPCode, but a one-on-one game plan is the norm.

It's very important to note that ZIP Codes aren't "boundaries." They're acollection ofdelivery routes. Theydon't follow geographic or administrative boundary lines; they can cross city, county, or even statelines.Theyfollow where the delivery trucks go.

Some ZIP Codes are special cases. Among them are "military" ZIP Codes, which include everythingfrommilitarybases (domestic or otherwise) to battleships at sea. Then there are "unique" ZIPCodes. Businesses and organizations sometimes get their own ZIP Codes, due to the volume of mailtheysendand receive. These are frequently benefiting from bulk mailing discounts, since the organization usually hasamail department that (1) presorts mail before giving it to the USPS, and (2) distributes mail internally sotheUSPS doesn't have to. Like standard ZIP Codes, "military" and "unique" ZIP Codescircumscribe their own deliveryarea. For a more in depth guide, visit our ZIP Codes page.

ZIP Code + 4 Meaning

ZIP+4™ Codes Lookup by Address | What It Is & How to Find It (3)

ZIP+4 Codes are 4-digit codes appended to the original 5-digit USPS ZIP Codes. Using full ZIP Codes when mailing with the USPS ensure the fastest, most accurate mailing possible. ZIP+4 Finder tools don't just lookup the full ZIP Code. The +4 is only provided once the address has been standardized, validated and proven real. Thesecodes indicate a specific delivery route, meaning the actual path the mail truck would travel in asingle drop-off. Usually this comprises ten to twenty homes or locations. ZIP+4 Codes are also assigned toPO Boxes. Typically, each PO Box gets its own +4 Code, which often matches the box number.

Because ZIP codes plus 4 extra digits are based on delivery routes instead of more permanent boundaries, thelast 4 digits of a completeZIP Code can change often. Five-digit ZIP Codes also change,but they do so infrequently; it's a lot less likelythat you will be living in a ZIP Code when it changes. Not so for the full 9-digit ZIP Code. The +4 on a ZIPCode can be changed as frequently as once a month, based on things like how many postal employees are working, or who is working what route, etc.

Full ZIP+4 Code Lookup Benefits

ZIP+4™ Codes Lookup by Address | What It Is & How to Find It (4)

There are a number of reasons that looking up and using full ZIP+4 Codes are good omens for your shipping. For one, ZIP+4 Codesrequire validation; that means you know for sure an address is real if it has a ZIP+4 attached to it. For anotherthing, they can help get you those bulk mailing discounts.

(Video) How to Connect your Antenna and get the most channels

Another important benefit to using the last four digits of ZIP Codes is delivery speed. Using complete ZIP+4 on your mail can speed up processing and delivery, sometimes by as much as two days. That's right, your mail can show up fasterif you label things right. Bet you're scrambling to lookup those full ZIP Codes now, huh? Get those extra 4 digits.

ZIP+4 Code Database

For many users the best way to access the USPS ZIP+4 database is through a CASS Certified USPS address validation vendor. like Smarty.Since the last four digits of ZIP Codes update frequently, even month old data isn't reliable. Checking addresses against the database regularly will ensure your data remains clean.

The ZIP+4 Code database can also be accessed free directly through the USPS site or through the USPS address validation API. A comprehensive list of uses and limitations of the USPS web-based finder and API can be found in our USPS APIs article.

Conclusion | What is My +4 ZIP Code?

If you want to ask, "What is my +4 ZIP Code?" All you need to do is use one of the three buttons at the top of the page, enter your address and you will have your +4 code instantly. That was easy!

Three things will be on the quiz:

  1. ZIP+4 Codes indicate delivery routes.
  2. Using ZIP+4 Codes gets your mail there faster and more accurately.
  3. We at Smarty (formerly SmartyStreets) can get you those codes.

If you want to try it on a single address, you can use our singleaddress verification tool now. Our blindingly fast USPS addressverification API provides the appropriate ZIP+4 Code for every address we process. Go ahead and perform some postal address verification. Or you couldcall us instead if you'd rather talk to a real person. (We'd offer a fakeperson, but we don't have one of those on staff.) Either way, we can help you ZIP your address, and ZIPit good.


What are the 4 extra digits of a ZIP Code? ›

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.

How do you determine a ZIP Code? ›

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.

Can Google Maps search zip codes? ›

This ZIP Codes on Google Maps tool will show all ZIP Code boundaries, in the U.S. anyway. To see ZIP Codes for a specific city, address, etc, just type the city or address in the "Search places" box just above the map.

What does ZIP Code reveal? ›

The first digit in a ZIP code represents a defined group of U.S. states. The second and third digits represent a region in that group, such as a large city. To send mail, only the first five digits of the ZIP code are required.

What is a ZIP 4 code and how is it different from a 5 digit ZIP Code quizlet? ›

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.

How do you write an address with a ZIP Code? ›

If you want to improve the chances that the letter will make it to its destination quickly, you should use the five-digit ZIP code plus the four additional numbers that are specific to the area. To format, write the ZIP code with a hyphen afterward and then the four additional numbers will immediately follow that.

What is ZIP Code full form? ›

ZIP is an acronym for Zone Improvement Plan. However, the USPS intentionally chose the acronym to indicate that mail travels more quickly when senders mark the postal code on their packages and envelopes. It makes sense that the term ZIP code would be related to being zippy, which means “lively” or “peppy.”

What is an example of a ZIP Code? ›

Standard US ZIP codes

The standard ZIP code notation used by the United States Postal service uses five digits to identify a delivery area. An example of a standard US ZIP code is 90210.

What is the lowest ZIP Code? ›

The lowest ZIP Code number is 00501, unique for the Internal Revenue Service in Holtsville, NY.

How do I pull a ZIP code from a map? ›

Click on the map to start drawing an area. Once you have defined the area in which you wish to search, click the [Search For Zip Codes] button. After a small delay, the results will appear inside the area. If you hover over or tap a marker, you will see its ZIP code.

How do I import a ZIP code into Google Maps? ›

  1. On your computer, sign in to My Maps.
  2. Open or create a map.
  3. In the map legend, click Add layer.
  4. Give the new layer a name.
  5. Under the new layer, click Import.
  6. Upload the file or photos that have your info. Then click Select.

How do I print a ZIP code map? ›

Custom ZIP Code Map

If you would like to print a ZIP code map of a particular area, enter the ZIP code you would like the map centered around. From the search results page, just zoom in on the area that you would like print and click "Print Map" in the top right corner of the map.

What can hackers do with your ZIP code? ›

Disclosing ZIP codes allows "people [to] track their purchases. It creates a profile and that information can be shared with other companies and that's dangerous to have that information in one area," says lawyer Gene J. Stonebarger, whose lawsuit triggered the ruling.

Is it safe to tell someone your ZIP code? ›

(Making you key it in serves as an added security measure to foil a thief who doesn't know the numbers.) But it's usually unnecessary at brick-and-mortar stores, so just say no. And your ZIP code certainly shouldn't be posted on social media or other public websites.

Is ZIP code and postal code the same? ›

Zip code refers to a type of postal code and is used primarily in the United States and the Philippines. The postal code, however, is typically utilized by the rest of the countries scattered throughout the world.

Where is the barcode clear zone on an envelope? ›

The barcode clear zone is a rectangular area in the lower right corner of the address side of cards and letter-size pieces defined by these boundaries: Left: 4-3/4 inches from the right edge of the piece. Right: right edge of the piece. Top: 5/8 inch from the bottom edge of the piece.

How many different zip codes are possible using 5 digits? ›

1 Expert Answer

There are ten possible digits (0 to 9). This means 100000 possible zip codes if repeatable. 540 * 56 = 30240 zip codes without any repetitions.

How many different zip codes are possible using 9 digits? ›

Thus, the fundamental counting principle gives that the number of possible 9-digit zip codes, in which the first digit cannot be 0, is equal to the product of the number of possible digits for each digit in the zip code. Therefore, there are 900,000,000 possible 9-digit zip codes when the first digit cannot be 0.

What is an example of a address? ›

123 Main Street, New York, NY 10030 is an example of an address. A formal speech or written communication.

How do you read an address? ›

How To Say American Addresses - YouTube

What was before zip codes? ›

The prehistory of the ZIP code

You might have used the recipient's street address along with the city and state, but you wouldn't have seen a ZIP code. Mail was hand-sorted, and delivery relied on local knowledge of its intended destination.

What is a valid US zip code? ›

The current postal codes in the United States range from 00001 – 99950.

How many numbers are there in a zip code? ›

A ZIP code is a postal code used by the United States Postal Service (USPS) in a system it introduced in 1963. An extended ZIP+4 code was introduced in 1983 which includes the five digits of the ZIP code, followed by a hyphen and four additional digits that reference a more specific location.

What is the ZIP Code format? ›

The most complete ZIP Code is a nine-digit number consisting of five digits, a hyphen, and four digits, which the USPS describes by its trademark ZIP+4. The correct format for a numeric ZIP+4 code is five digits, a hyphen, and four digits.

Why do we have ZIP Codes? ›

In the United States, ZIP codes are a type of postal code. Individuals who mail letters or packages via the United States Postal Services (USPS) are required to write the code as part of the address. This five-digit code helps ensure that parcels get to their intended destination faster.

What's the poorest ZIP Code in the US? ›

1. Zip code: 15929 │ East Wheatfield, Pennsylvania.
  • Median household income, that is, the point that divides half the people making more and half making less.
  • Mean household income, which is the total of all incomes, divided by the number of people reporting.
18 Jul 2019

What's the wealthiest ZIP Code? ›

Table of Contents
#Zip CodeCity
5 more rows
12 May 2022

What is the oldest ZIP Code? ›

The first ZIP code was issued to Agawam, Massachusetts. The town's postal code is 01001. Agawam is a town rich in history - from its founding in 1636, to its incorporation in 1855, to having the first Zip Code in the United States.

How do I plot multiple ZIP codes on Google Maps? ›

Add a place
  1. On your computer, sign in to My Maps.
  2. Open or create a map. A map can have up to 10,000 lines, shapes, or places.
  3. Click Add marker .
  4. Select a layer and click where to put the place. A layer can have 2,000 lines, shapes, or places.
  5. Give your place a name.
  6. Click Save.

Can Excel map zip codes? ›

Once you finish arranging your data, select the cells you want to turn into the map. Then on the Insert tab, go to Charts > Maps > Filled Map. Here Excel reads the ZIP codes you entered and creates a map chart based on them.

How do I search county by ZIP code in Excel? ›

Get City, County, and State from Zip Codes - YouTube

How do I create a map from a list of addresses? ›

Open a browser, and go to Google Maps (make sure you are signed in).
  1. From the menu (upper left, looks like parallel lines), select “your places”
  2. Click on MAPS.
  3. At the bottom, click on “CREATE MAP”
  4. In the middle of the box that appears, click on “Import”
  5. Select the xlsx file from your computer or drag it into the box.
6 Sept 2018

Is there a way to plot addresses on a map? ›

Welcome to! You can use this site to plot multiple addresses on a single map using Google Maps. To get started, enter an address in the form below. You can give the location a description if you like, or you can leave that field blank.

How many addresses can I put into Google Maps? ›

On your computer, open Google Maps. Add a starting point and a destination. To add a stop, choose another destination. You can add up to 9 stops.

What is mapping software used for? ›

Mapping software is a computer system that allows you to map, model, query, and analyze large quantities of data within a single database according to their location.

What is the second set of numbers in a zip code? ›

The first number, between 0-9, denotes a geographic area of the U.S. The second two numbers of a zip code specify a specific region within that geographic area and the last two are meant to indicate a specific Post Office.

Is there a 00001 zip code? ›

The current postal codes in the United States range from 00001 – 99950. The lowest and highest of these postal codes are both specific to areas in Alaska; The 00001 code is for the N Dillingham area, and the postal code 99950 is for Ketchikan, AK.

Where is the zip code 00000? ›

Assuming we are talking about the US, the 00000 zip code does not exist. So why enter it in the database. Just send that postcard to "One Microsoft Way, Redmond, WA" without a zip code and it will get there just fine. Entering "magic values" like this may come to haunt you.

What is the dash after zip code? ›

The term ZIP stands for Zone Improvement Plan. The basic 5-digit format was first introduced in 1963 and later extended to add an additional 4 digits after a dash to form a ZIP+4 code. The additional 4 digits help USPS more precisely group mail for delivery.

Do all state zip codes start with the same number? ›

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.

Is ZIP Code and postal code the same? ›

Zip code refers to a type of postal code and is used primarily in the United States and the Philippines. The postal code, however, is typically utilized by the rest of the countries scattered throughout the world.

What's the smallest ZIP Code? ›

The lowest ZIP Code number is 00501, unique for the Internal Revenue Service in Holtsville, NY.

Is 12345 a valid ZIP Code? ›

12345 is a unique ZIP Code. Since mail to addresses within a unique ZIP Code is handled by the organization who owns the ZIP Code (and not by the USPS), no verification is performed on the street address. The address is technically deliverable with nothing more than a ZIP Code.

What is the oldest ZIP Code in the United States? ›

This first-ever ZIP Code was 00601, designating a decent chunk of Puerto Rico as the first Zone Improvement Plan (ZIP) in the United States.

Are there 4 digit ZIP Codes in the US? ›

The ZIP+4 code is used and assigned by the United States Postal Service (USPS) for routing purposes. The final 4 digits are not required for delivery of your mail and may change frequently. There have been several +4 digit changes as a result of the Marathon County Uniform Addressing Program.

What is a 5 digit ZIP Code? ›

A ZIP Code is a 5-digit number that specifies an individual destination post office or mail delivery area. ZIP Codes determine the destination of letters for final sorting and delivery. Each ZIP Code designates a collection of delivery routes used by mail carriers and areas serviced by the USPS.

Is 99999 a valid ZIP Code? ›

It doesn't exist. In fact, the highest real zip code is 99950, for Ketchikan, Alaska. Still, if you scour your database, there's a good chance you'll find more than a few 99999 zip codes. Most organizations find that it's been entered as a placeholder in their shipment database.

What is the highest ZIP Code? ›

The highest ZIP Code number is 99950 in Ketchikan, AK.

What happens if I use the wrong zip code? ›

Usually what happens is a carrier or post master from the office where the package is sent will correct the zip code by looking at the address and even reach out to that particular post office to ensure the package is delivered to the correct address.


1. How To Send USPS Certified Mail and Return Receipts
(Innominate Kraken)
2. How to Check Country/Region of PSN Account | Check Country of PS3/PS4/PS5 Account
(Wasay Tech Tips)
3. 11.3: Chrome Extensions: Content Scripts - Programming with Text
(The Coding Train)
5. 411 canada
(Entrepreneurship pdf)
6. Raven Pro Document Scanner - What You Need To Know
(Tech Steve)
Top Articles
Latest Posts
Article information

Author: Kieth Sipes

Last Updated: 03/31/2023

Views: 5663

Rating: 4.7 / 5 (67 voted)

Reviews: 90% of readers found this page helpful

Author information

Name: Kieth Sipes

Birthday: 2001-04-14

Address: Suite 492 62479 Champlin Loop, South Catrice, MS 57271

Phone: +9663362133320

Job: District Sales Analyst

Hobby: Digital arts, Dance, Ghost hunting, Worldbuilding, Kayaking, Table tennis, 3D printing

Introduction: My name is Kieth Sipes, I am a zany, rich, courageous, powerful, faithful, jolly, excited person who loves writing and wants to share my knowledge and understanding with you.