How Do You Findout What Your ZIP+4 Code is?

The first five digits identify the area of the country and the delivery office to which the mail is directed. ZIP Codes start with a zero (0) in the northeast and gradually get higher as you move west. ZIP Codes in the far west start with a nine (9).


The sixth and seventh digits point to a delivery sector, which may be several blocks, a group of streets, a group of Post Office boxes, several office buildings, a single high-rise office building, a large apartment building or a small geographic area.

You can check your current location ZIP code or postal code with address by ZIP code finder and lookup tool. It will help you to get best things to do near your location.

The last two digits represent a delivery segment, which might be one floor of an office building, a side of a street, specific departments in an office, or specific Post Office boxes.

ZIP Code Overview

ZIP codes are a system of postal codes used by the United States Postal Service (USPS) since 1963. Before 1963, cities simply had postal zones” in 124 of the nation’s most populated areas.

But when mail started to boom, in order to meet the growing demand, the U.S. Postal Service decided to add five numbers to addresses to make mail more efficient as a part of a Zone Improvement Plan (the ZIP in ZIP code stands for Zone Improvement Plan).

ZIP codes are used by the US Postal Service to map the most efficient routes for mail carriers to follow.

ZIP Codes are numbered with the first digit representing a certain group of U.S. states, the second and third digits together representing a region in that group (or perhaps a large city) and the fourth and fifth digits representing a group of delivery addresses within that region.

The fourth and fifth digits were proposed by Henry Bentley Hahn Sir which gives a more precise locale within the SCF 6 The SCF sorts mail to all post offices with those first three digits in their ZIP Codes. Robert Moon is considered the father of the ZIP Code.

He submitted his proposal in 1944 while working as a postal inspector 5 The post office only credits Moon with the first three digits of the ZIP Code, which describe the sectional center facility (SCF) or “sec center.” An SCF is a central mail processing facility with those three digits.

What is ZIP Code?

The term ZIP is an acronym for Zone Improvement Plan. It was chosen to suggest that the mail travels more efficiently and quickly (zipping along) when senders use the code in the postal address the basic format consists of five digits.

There are no ZIP codes reserved for designating mail bound for foreign destinations (with the exception of U.S. military units stationed outside of the United States), and therefore, international outbound mail should not include a ZIP code in the delivery address.

In order to promote the idea of ZIP codes, Mr. Zip” appeared as the cartoon mascot for the campaign, touting Put ZIP in your mail!” While Mr. Zip is obviously a fictional figure, a Philadelphia postal inspector named Robert Moon is widely considered to be the real-life version and the father of the ZIP code even though the Postal Service refused to give him sole credit for the invention.

Like area codes, ZIP codes are sometimes divided and changed, especially when a rural area becomes suburban Typically, the new codes become effective once announced, and a grace period (e.g., one year) is provided in which the new and old codes are used concurrently so that postal patrons in the affected area can notify correspondents, order new stationery, etc.

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

It’s very important to note that ZIP Codes aren’t “boundaries.” They’re a collection of delivery routes. They don’t follow geographic or administrative boundary lines; they can cross city, county, even state lines. They follow where the delivery trucks go.

Some ZIP Codes are special cases. Among them are “military” ZIP Codes, which include everything from military bases (domestic or otherwise) to battleships at sea. Then there are “unique” codes. Businesses and organizations sometimes get their own ZIP Codes, due to the volume of mail they send and receive.

These are frequently benefiting from bulk mailing discounts, since the organization usually has a mail department that (1) presorts mail before giving it to the USPS, and (2) distributes mail internally so the USPS doesn’t have to. Like standard ZIP Codes, “military” and “unique” ZIP Codes circumscribe their own delivery area.

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