“US law enforcement officers working on anti-drugs operations have had access to a vast database of call records dating back to 1987, supplied by the phone company AT&T. The project, known as Hemisphere, gives federal and local officers working on drug cases access to a database of phone metadata populated by more than four billion new call records each day. Unlike the controversial call record accesses obtained by the NSA, the data is stored by AT&T, not the government, but officials can access individual’s phone records within an hour of an administrative subpoena. AT&T receives payment from the government in order to sit its employees alongside drug units to aid with access to the data.”
