United States Zip Codes list | Zip Code Lookup or Postal Code Map and Area Codes With Zip Code Map By Zipcodesusa.org

What is Zip code? :

Usa Zip code (Also known as postcode, post code, Eircode, PIN Code or Postal Code) is a 5 digit code included in a postal address for the purpose of sorting Mails in City, state, County or Country. Zip code is a five digit number in which the first three digits will define the sectional facility and the last two digits will represent the state it belongs to.
This is an unique Code consisted of Number and Character used by (USPS) United States Postal Service from 1963 for Delivering the Mails or Parcels more efficiently and quickly in whole country. Abbreviation for ZIP is “Zone Improvement Plan”, was chosen with the commitment To deliver the parcels more efficiently.

Type of ZIP Codes? There are mainly four types of ZIP codes:

  • Unique Zip Codes: These are assigned to a single address which has high-volume of mails like government agencies, businesses, universities or buildings that get high volume of mails on daily basis.
  • Post Office (PO) Box only: These are used for PO Boxes only which are provided at a given facility, mainly in the Post Office
  • Military: These are used to deliver the mails for the U.S. military only
  • Standard: These are used for all other ZIP codes and they use the same Zip code of the local post office