The TERYT web service ws1 that makes the data available from the TERYT register to public administration entities and commercial entities. Service and data are available free of charge. The file sharing format is xml.

The following catalogs are available:

• identifiers and names of territorial division units (TERC),
• identifiers and names of towns (SIMC),
• The Central Catalogue of Streets (ULIC),
• a set of definitions for the types of towns WMRODZ and
• Nomenclature of Territorial Units for Statistical Purposes (NTS).

The TERYT service ws1 provides users methods that perform the following functionalities:

• downloading units of territorial division, towns and streets (full files),
• downloading information about changes in the registry created in a given period of time (updating files),
• downloading a specific range of data about territorial division units - list of objects,
• verification of address data to the street level,
• searching for units of territorial division, towns and streets.

Verification of address data to the street level applies only to the current status of the TERYT database and is based on names or identifiers.