A US zip code directory is an important tool to have around the office, especially if your business sends and receives a large amount of mail. By using a US Zip code lookup system, you can ensure that you always have the right zip code to deliver your mail get to its proper destination on time.

A postal zip code lookup is more important now than ever because some cities have added zip codes as they have grown. Make sure that you verify zip codes before sending out your next shipment of mail. When using a zip code lookup, consider the following:

1. If you are sending mail across the world, always consult an international zip code lookup.

2. If you already have a zip code and need to know the address or owner associated with it, use a reverse zip code lookup.

3. Use a US zip code directory that will let you look up companies and other resources in that zip code.

Action Steps
The best contacts and resources to help you get it done

Search zip codes using US zip code lookup

If your clients have moved, or you are just unsure of their zip code, use a zip code lookup by city to help point you in the right direction. These directories can give you the information you need.

I recommend: U.S.Zip.org and Mongabay list the zip code for every city in the United States. Zip-codes.com gives similar information and will also give you background on the history of Zip codes.

Use a reverse zip code lookup to correct any errors you may have

If you think you have an incorrect zip code, or if you want to find out all of the towns and cities in a code, search reverse zip code lookup resources. If you already have the zip code, enter it into a US zip code directory and find its origin.

I recommend: Conduct a reverse zip code lookup at Addresses.com or 411.com or find out all of the cities and towns in a zip code at the U.S. Postal Service.

Find worldwide codes with an international zip code lookup

If your business regularly sends mail out of the country, it would be very useful to conduct an international zip code lookup for the addresses you use the most. Countries have differing postal systems so it is critical that you double-check the zip code before you send your mail.

I recommend: Conduct a worldwide zip code lookup at FreeSearching.com, EmbassyWorld.Com and ZIPCodeDownload.com.

Tips & Tactics

Helpful advice for making the most of this Guide

• •  Search for a zip code with the extended four numerals at the end. Using this code expedites delivery.
• •  Save on costs by using free zip code lookup resources.

A US zip code directory is a great tool to utilize if you have friends and family members scattered around the country. It is very important to make sure you always have the correct zip code on your letter or package. Failure to do so could result in lost or delayed mail. Due to the increasing population and the growth of cities and countries, postal codes change now and again. It is important to make sure you have the most up-to-date version of the zip code.

Make sure that your next letter or package makes it to the recipient on time. Follow these steps to lookup zip codes:

1. Find sources for US zip code lookup.

2. Locate a free tool for worldwide zip code lookup.

3. Utilize an online tool for reverse zip code lookup.

Action Steps
The best contacts and resources to help you get it done

Lookup zip codes of cities in the United States

More and more people have family and friends who have moved to a different city or state. It is important to keep up with the zip codes of those closest to you. Many sites offer free zip code lookup such as zip code lookup by city.

I recommend: The website of the United States Postal Service provides a free tool to find zip codes using an address, city and state or company name. Mongabay.com lists the zip code for every city in the US. Zip-codes.com provides zip codes for all of the United States as well as giving some background information on the history of the zip code and postal service.

Find a source for international zip code lookup

Do you have a relative or child who is studying abroad? Is there someone you know who is stationed overseas while in the military? These instances are when it helps to have a website for international zip code lookup. Most countries have unique postal code systems, so it is important to know the exact formula for the international postal codes you will be using the most.

I recommend: The EmbassyWorld website gives the postal codes for countries throughout the world, most of them in both English and the native language of that country. Escapeartist.com lists zip codes of different countries as well as linking to the postal service website for some of the countries.

Rely on reverse zip code lookup to prevent errors and delays

The postal service will return your mail if the zip code is missing or incorrect. It is important to verify, double-check and lookup zip codes that you will be using to ensure your letter or package arrives in a timely manner.

I recommend: Uszip.org has a search function to perform a reverse zip code lookup. Phonebook.com will display the city and state once given a zip code. Finally, 411.com has a reverse zip code look up in addition to a number of other search options.

Tips & Tactics

Helpful advice for making the most of this Guide

• •  Reduce your zip code lookup time by saving any return address labels for people and companies that you will be sending things to often. The area residents are usually the first people to be notified of a zip code change and will have already updated their return address to reflect this.