A postcode, also known as a postal code or ZIP code, is a series of letters and numbers that are added to a postal address to help sort and deliver mail. Postcodes are used in many countries around the world, and they can vary in format depending on the country.
There are a number of reasons why you might need to check a postcode. For example, you might need to check a postcode to make sure that it is correct before you send a letter or parcel. You might also need to check a postcode to find out what area it is in. In some cases, you might even need to check a postcode to find out if a particular address exists.