Moncodepostal.fr is an online reference and mapping service for exploring French postal codes. Visitors can search by town, address, department, or postal code, and use an interactive map to locate results. The site covers metropolitan France and overseas territories, with department and territory lists that help users browse postal codes by area.

The website explains how French postal codes work, including their five-digit format, and shares statistics drawn from La Poste’s latest published data. These include the number of codes and communes, how often a postal code serves multiple communes, and cases where a commune has several codes or a code spans two departments. Articles and visualizations offer further context, including a graphic representation of the national postal-code distribution and rankings of notable codes and communes.

Moncodepostal.fr also provides a downloadable address tool. Users can generate a CSV file compatible with Excel for a postal code or commune, with coordinates alone or complete postal addresses.