AirSage, an Atlanta, Georgia, a company founded in 2000, has spent much of the last decade negotiating what it says are exclusive rights to put its hardware inside the firewalls of two of the top three U.S. wireless carriers and collect, anonymize, encrypt, and analyze cellular tower signaling data in real time. Since AirSage solidified the second of these major partnerships about a year ago (it won’t specify which specific carriers it works with), it has been processing 15 billion locations a day and can account for movement of about a third of the U.S. population in some places to within less than 100 meters, says marketing vice president Andrea Moe.

As users’ mobile devices ping cellular towers in different locations, AirSage’s algorithms look for patterns in that location data—mostly to help transportation planners and traffic reports, so far. For example, the software might infer that the owners of devices that spend time in a business park from nine to five are likely at work, so a highway engineer might be able to estimate how much traffic on the local freeway exit is due to commuters.

via How Verizon and Other Wireless Carriers Are Mining Customer Data | MIT Technology Review.