ZIP codes and postal codes are two different ways to identify locations. The former is used for easy sorting and delivery and the latter is used for identifying individual locations for route planning. They have many uses and are used widely around the world. The United States Postal Service adopted postal codes in 1943 and the United Kingdom implemented them between 1956 and 1974. Depending on the country, postal codes are made up of two digits and one or more letters.
The postal code is used by mail services to deliver mail. The ZIP code does not always correspond to the city where the mail is received. The USPS assigns a city name to each ZIP code, but often this is the city name of the main post office. In Missouri, for example, most ZIP codes have the city of Saint Louis, though the city may also be the name of a smaller city.
A postal code may contain numbers, alphabets, and symbols, while a ZIP code is a five-digit number that is used to identify a city. Both are used to sort mail and identify where to send packages and documents. A zip code is often used to identify a certain location and is used for route planning and to gather demographic information.
Some postal codes are more precise than others. In some cases, the code refers to a post office, delivery route, or specific houses. In rural areas, postcodes can overlap, so GL20 8NX/1 can be used for both 1 Frampton Cottages and 1 Frampton Farm Cottages.
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