Whois & Analysis for unitedstateszipcodes.org

ZIP Codes are a system of postal codes used by the United States Postal Service (USPS) since 1963.

The term ZIP, an acronym for Zone Improvement Plan, was chosen to suggest that the mail travels more efficiently, and therefore more quickly, when senders use the code in the postal address.

The basic format consists of five numerical digits.

An extended ZIP+4 code, introduced in 1983, includes the five digits of the ZIP Code, a hyphen, and four additional digits that determine a more specific location within a given ZIP Code.

FedEx Corporation is an American multinational courier delivery services company headquartered in Memphis, Tennessee.

The name "FedEx" is a syllabic abbreviation of the name of the company's original air division, Federal Express, which was used from 1973 until 2000.

The company is known for its overnight shipping service, but also for pioneering a system that could track packages and provide real-time updates on package location (to help in finding lost packages), a feature that has now been implemented by most other carrier services.

The United States Postal Service (USPS), (also known as the Post Office, U.S. Mail, or Postal Service), is an independent agency of the United States federal government responsible for providing postal service in the United States.

It is one of the few government agencies explicitly authorized by the United States Constitution.

In computer science, a list or sequence is an abstract data type that represents a countable number of ordered values, where the same value may occur more than once.

An instance of a list is a computer representation of the mathematical concept of a finite sequence; the (potentially) infinite analog of a list is a stream.

Lists are a basic example of containers, as they contain other values.

If the same value occurs multiple times, each occurrence is considered a distinct item.

In computer science, an associative array, map, symbol table, or dictionary is an abstract data type composed of a collection of (key, value) pairs, such that each possible key appears at most once in the collection.