Réunion is an overseas département of France. Use the White Pages or Yellow Pages for France, and enter "974" or "Réunion" in the location box.
Country code: +262
Business directory with almost 10,000 entries for Réunion - no direct keyword search facility on the home page but if you click on one of the categories it will show a list of the companies or services and also a search box above them. The search box also includes drop down options for the area of Réunion you're wanting to focus on or you can do a general search of the whole region. In French.
Official White Pages of France, including the French overseas territories and departments. Search by names of people. In French. To use; enter last name in nom and optionally the first name in prénom. Then enter the location, and press trouver to search. For reverse search (search by number) click on the Annuaire inversé tab and enter the number.
Official Yellow Pages for France, including overseas dependencies. In French. Enter the type of business (in French) or an part of the business name in Quoi, Qui, and a geographic location (city, region etc) in Où and press Trouver to search.
Small and basic business directory. Type in the business you're looking for in the box Rechercher une entreprise and then click OK.