Postcodes for Large Organisations

In some postal systems, a large organisation can be given a postcode all of its own. This is usually reserved for receivers that handle a high volume of mail, such as government departments, universities, banks, hospitals or mail-order companies.

Why give an organisation its own code

For the operator, a dedicated code saves effort. Mail marked with it can be sorted straight to one destination, without further reading of the street address. For the organisation, mail arrives in one batch at its mailroom or collection point. It is a sorting convenience, not a status symbol.

How it looks

Where this exists, the code looks like any other in the national format. It may be used together with the organisation name and a department, rather than a street and number. The rules about who qualifies, and how the code is displayed, are set by each operator.

What it does not tell you

A dedicated code identifies where mail is received, which can differ from where staff work or where visitors should go. Many large organisations have several campuses and entrances. A visitor or courier may need a separate street address, and sometimes more than that. Compare with postcodes for PO boxes, which follow the same logic: the code is about mail, not the physical place.

Data quality angle

For a business building a customer database, a unique postcode may point to one organisation rather than a neighbourhood. That affects analysis such as grouping customers by area; see how businesses use postcode data.

Large sites and exact entrances

Hospitals, campuses, industrial estates and shopping centres often have dozens of entrances and loading bays. A postcode, even a dedicated one, cannot say which one a delivery should use. In such cases an exact-location code for the correct gate helps drivers. UPCS provides this kind of code for a 3 m by 3 m map cell and is meant to be shared with the street address, not instead of it. Read how exact-location codes complement postcodes.

Related background

For how the operator decides which codes to give out, see how postcodes are assigned.