When were zip codes


A ZIP Code is a postal code used by the United States Postal Service (USPS) in a system it specific location. The term ZIP Code was originally registered as a servicemark by the U.S. Postal Service, but its registration has since expired. The word ZIP was chosen to suggest that the mail travels more efficiently, and more quickly, when senders use it. The basic ZIP code is made up of five numbers. Zip codes are actually a much more recent phenomenon than you might believe. In fact, they're only 52 years old—a concept that was.

You might have used the recipient's street address along with the city and state, but you wouldn't have seen a ZIP code. Mail was hand-sorted, and delivery. ZIP CODES - By , most of first-class mail in the United States was generated by a small number of large-volume mailers, so The Post Office Department. ZIP Code. During World War II, thousands of experienced postal employees left to Under this system, delivery units or zones were identified by one or two.

What is a USPS ZIP Code? How do they work and how do I find my ZIP Code?. By the early s, the swelling volume of mail was taxing the Post Office Department to its limits. Zoning Improvement Plan—ZIP—Codes were one response to. In America adopted the postal code, but named it Zone Improvement Plan code or ZIP code for short. The Zip code is used in all 50 states.