1. A system for detecting computer network threats, the system comprising: one or more computer hardware processors that execute specific code instructions to cause the system to at least: receive a network address from a first data source, the first data source comprising a computing system connected to a network, the computing system configured to receive network traffic; determine a threat indicator for the network address, wherein the threat indicator indicates a risk level associated with the network address, and wherein the threat indicator is based at least in part on: a quantity of occurrences of the network address in the first data source, a cumulative time between respective occurrences of the network address in the first data source and a first time, and a likelihood that a perceived threat of the network address is an actual threat, wherein the likelihood is based at least in part on historical data of past threat events from the first data source; and provide the threat indicator to an entity device, wherein the entity device is configured to block the network address based at least in part on the threat indicator.