Editing Postal code (section)

== National systems ==
[[Romania]] uses six-digit postal codes. The first two digits identify a county or a sector of [[Bucharest]], and the remaining digits narrow down the delivery location. In [[Ilfov County]], the commune of [[Balotești]] uses the postal code 077015.<ref name="balotesti"/>

[[Germany]] introduced its five-digit postal code system on 1 July 1993, replacing the four-digit systems previously used in East and West Germany. A single code may serve neighbouring settlements. [[Stommeln]] and [[Stommelerbusch]], both districts of [[Pulheim]] in [[North Rhine-Westphalia]], share the postal code 50259.<ref name="stommeln"/><ref name="stommelerbusch"/>

In the [[Netherlands]], a postcode consists of four digits followed by two letters. The digits identify a postal area, and the letters specify a smaller group of addresses. The [[United Kingdom]] uses an alphanumeric system in which a postcode is divided into an outward code and an inward code. The outward code identifies a postal district, and the inward code identifies a smaller delivery area.

The United States introduced the five-digit ZIP Code on 1 July 1963. ZIP stands for ''Zone Improvement Plan''. In 1983, the [[United States Postal Service]] introduced ZIP+4, which adds four digits after a hyphen to identify a more specific delivery segment.