Let’s say you’re DHS. You contact some person and have a conversation like this Govt: “I need IP addresses, ideally cellular and known public wifi, of a person

Let’s say you’re DHS. You contact some person and have a conversation like this Govt: “I need IP addresses, ideally cellular and known public wifi, of a person using this email address”. Data broker: “Here’s the list including the most recent cellular IP address associated with that person at this timestamp and their most used public wifi locations.” Govt: “Hey, cellular provider, where is this subscriber right now?” Provider: “Here’s the lat/long, last seen 1 second ago. Happy hunting!”