Looking to find a zip code by address or use US postal zip code lists? Look no further as we lay out everything you need to find both.

If you ever want to send a piece of mail to someone within this country, but you don’t know that person’s 9 digit ZIP code, read on.

When you try to find 9 digit ZIP code by address, remember that the first digit describes a geographical area. This can be a group of states, for instance.

In 1983, changes were made, which resulted in the introduction of the ZIP + 4 format. Hence, US postal zip code zones now have five digits and a hyphen followed by a further four digits.

Zip codes are numerical codes that designate a specific geographical area of the country. You can learn more about US postal zip code lists and how to look them up, but it may be interesting to understand the meaning of the numbers first.

There were a number of specific events that made the United States Postal Service (USPS) need to develop a zip code system. When you learn all about US postal zip codes, you get to know quite a bit of our country’s history, in fact.

If you are looking to send your mail through the United States Postal Service and you want it there as fast as possible, then take the time to look up the ZIP Code +4 digits online. It is the best way to learn how to find the +4 in a US Postal Zip Code and the fastest way to get your mail where you want it to be without delay.