Here is the FBI’s Contract to Buy Mass Internet Data - The FBI previously purchased access to "netflow" data, which a company called Team Cymru obtains from ISPs. Team Cymru then sells it to the government.

TL;DR

the internal document reads. Do you work at a company that handles netflow data? Do you work at an ISP distributing that data? Or do you know anything else about the trade or use of netflow data? We'd love to hear from you. The purchase was part of a national security pilot project which has not been active for some time, Wray said

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