A computer-implemented method is provided for mapping IP addresses and domain names to organizations. The method includes receiving, by a mapping system from an data provider, a dataset related to a plurality of users of the data provider. The dataset includes (a) an IP address for a user device of each user of the plurality of users, and (b) a domain name for a user account of each user of the plurality of users; enriching, by an analytics engine of the mapping system, the received dataset with enrichment data from an enrichment source; receiving, by the analytics engine from a storage medium, historical data relevant to the enriched dataset; and mapping, by the analytics engine, (i) the IP address and/or (ii) the domain name of each user of a portion of the plurality of users to an organization based on the enriched dataset and the historical data.