Network Entity Reputation Database (NERD) – Database of Malicious Entities

The NERD system gathers data about sources of cyber threats from a number of sources and builds a constantly-updated database of the known malicious network entities (currently only IP addresses). It provides detailed information about each of them, including when and where it was reported as malicious, auxiliary data such as hostname or geolocation, and a numeric summarization of the IP’s reputation. Most of the data are publicly accessible via a web interface.