To counter these types of network attacks, the Global System for Mobile Communications Association (GSMA) publishes guidelines for remote interconnect security. For example, GSMA documents FS.1 1 and FS.1 9 recommend whitelisting known trusted foreign network nodes, such as VLRs, MSCs, MMEs, FILRs, and FISSs to validate traffic arriving at a network from a foreign network and blocking traffic from unknown VLRs, MSCs, MMEs, HLRs, and HSSs. However, creating and maintaining whitelists of such nodes is impractical due to the number of nodes in global communications networks and changes in networks as new nodes are brought into service. For example, when a new node is added to the network, if that node is not present in the database, messages from the node will be discarded even though the node is not implementing a network attack. Additional types of checks that may be performed include time-based security checks where the time between two different location registrations of a subscriber is compared to what would constitute a reasonable time for the subscriber’smobile device to travel between the locations. If the time is unreasonable, one or the other registrations may be determined to be invalid and associated with a network attack. Like provisioning network node identities in a whitelist, provisioning reasonable times between subscriber registration points manually is undesirable and can lead to erroneous discarding of messages if the travel times are configured incorrectly. Accordingly, in light of these difficulties, there exists indeed for methods, systems, and computer readable media for dynamically learning and using foreign telecommunications network mobility management node information for security screening. A method for dynamically learning and using foreign mobility management node information for telecommunications network security screening includes operating a telecommunications network routing node in a learn mode in which traffic from foreign mobility management nodes is received and identities of the foreign mobility management nodes are learned and used to populate a security database maintained by the SUMMARY