Bel-index is an online reference and search service for postal codes across Belarus. Designed for people preparing letters, parcels, documents, and other mail, the website helps users find a code by entering an address or searching by postal code. Its database is described as containing more than 120,000 postal codes, with information covering the country’s regions, districts, cities, settlements, and streets.

The service presents an interactive search interface with filters and a map showing populated places and their associated codes. Users can narrow a lookup by selecting a region, district, settlement, street type, and street name; the resulting information is intended to support delivery through Belpochta. Bel-index covers Brest, Gomel, Vitebsk, Grodno, Mogilev, and Minsk regions, including both major cities and smaller communities.

The site says it regularly updates its data and aims to make postal information quick and convenient to access. Its core offering is a practical Belarus postal-code directory for everyday personal correspondence and business mailing tasks