The Dallas City Police - 5 NW, 6 NC, and 9 Departments are dispatched by the Communication and Information Services - 9-1-1 System in Dallas, ... See more TX, United States, providing a rapid response by fire, EMS and law enforcement departments to incidents and control of a wide-range of emergency situations, including Ch. 5 Northwest - 460.075 Ch. 6 North Central - 460.175 Ch. 9 Traffic/Detectives (Tango and Hotel Units) - 460.025.