Blue Enamel House Number plaque

Blue Enamel House Number sign

House numbering is the system of giving a unique number to each building in a street or area, with the intention of making it easier to locate a particular building. The house number is often part of a postal address.

House numbering schemes vary by place, and in many cases even within cities. In some areas of the world, including many remote areas, houses are not numbered at all, instead simply being named.