USA Zip Codes Search

美国邮政编码搜索通过州，县，市

USA Zip Codes Search Offline app will allow you to find a postal code with in the USA. It is quick and fast. You can search zip code information by below three methods.

- Find an USA zip code by city name.

- Find a city in the USA from a zip code.

- Find zip code by state, county, city.

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History:

US ZIP codes are a type of postal code used within the United States to help the United States Postal Service (USPS) route mail more efficiently. Some still refer to ZIP codes as US postal codes. 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. Though ZIP codes were originally developed for USPS, many other shipping companies such as United Parcel Service (UPS), Federal Express (FedEx), DHL, and others make use of ZIP codes for sorting packages and calculating the time and cost of shipping a package.

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