Just enter an address to search ZIP Code of United States. An acronym for Zone Improvement Plan 'ZIP' helps in identifying a specific geographic area for consignment delivery.
Literally, ZIP is an important asset for delivery of anything in this huge country like USA. It stands for Zone Improvement Plan. The United States Postal Service (USPS) uses United States postal code list for all the regions of USA. It helps them in finding mailing address in any states of the country.
Now, what is the United State postal code?
Initially five digits were there in a ZIP but 4 more digits were added later. The USPS has been using this format since 1963. For the convenience, the United States postal service allots four different types of ZIP codes:
The United States Census Bureau has developed ZIP Code Tabulation Areas (ZCTA) to convey statistical data about regions that are familiar to most citizens of United States. It is updated once in every 10 years.
Interestingly the first digit of ZIP code tells you the group of states from the North-east to the west coast. While initial 3 digits determine the central mail processing facility, which is also referred to as Sectional Center Facility or Sec Center. Here sorting of mails is done and then they are distributed according to the last 2 digits to various local post offices.