ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,549,513, issued on Feb. 10, was assigned to PROOFPOINT INC. (Sunnyvale, Calif.).

"Systems and methods for IP mass host verification" was invented by Bradley Scott Woodberg (Plymouth, Mich.) and Doyle Joseph Groves (Noblesville, Ind.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Systems, methods, and products for identifying IP mass hosts and determining whether they are good or bad. One embodiment is a method including selecting a first candidate IP address, identifying a set of domains hosted at the IP address, and identifying registrants of the domains. A number of unique ones of the registrants is determined and if the number of unique registrants e...