What type of obtain a court order forces to monitor traffic flowing between network service providers?

A court order that mandates the monitoring of traffic between network service providers is typically referred to as a "pen register" or "trap and trace" order. These orders allow law enforcement to collect non-content information about communications, such as phone numbers dialed or IP addresses, without accessing the actual content of the messages. Such orders are often issued under specific legal frameworks, such as the Electronic Communications Privacy Act (ECPA) in the United States, to ensure compliance with privacy protections while assisting in criminal investigations.