A postal code is a series of letters or digits or both, sometimes including spaces or punctuation, included in a postal address for the purpose of sorting and dispatching of mails.
Postal codes make it easy for the postman to locate the closest post office. And this makes it easy to package and deliver letters from one post office to the other. Once the letter gets to the post office in the locality, it is easy to locate the address of the recipient and make the delivery.
Postal codes in Nigeria are numeric, consisting of six digits. The Nigerian Postal Service (NIPOST) divides the country into six regions, which make up the first digit of the code. The second and third digits, combined with the first, are the dispatch district for outgoing sorting. The last three digits represent the delivery location. A delivery location can be any of the following; a post office facility, a rural area, or an urban area. In other words, postal codes in Nigeria vary for each city and locality within Nigeria.
Although postal codes are usually assigned to geographical areas, special postal codes are sometimes assigned to individual addresses or to institutions that receive large volumes of mail, such as large commercial companies and government agencies.
Zip code (zone improvement plan) is the standard term used in United States of America while the Postal Code applies to other mostly countries English-speaking countries throughout the world where it is also referred to as postcode or post code.
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