A postcode is a set of numbers or letters or a combination of the two that are used by postal services in the sorting and transport of mail to indicate the location where the package or letter is being sent. The first postcodes were created in 1857.
Postcodes were invented by Sir Rowland Hill, who also invented the postage stamp. Hill divided London into several postage districts to ease the burden of delivery on the mail service, spurring other locations in England to follow suit. Modern postcodes originated in 1959 when the entirety of the United Kingdom was divided into different postcodes. The United States introduced ZIP codes in 1963.