Chicago police radio codes. 2 days ago · OpenMHzChicago Police Department Ten-codes, also known as 10-codes or ten signals, are code words used by many police officers to aid with voice communication. Official feeds from the Chicago Police Department were apparently established in an effort to provide transparency as the police department converts their radio system to a secure encrypted system that can not be monitored by consumer police/fire scanning radios. Our website features a detailed, searchable database of all major police codes used in the United States, with a special focus on Chicago Police Codes. The codes were originally developed in 1937 to allow for brevity, clarity, and standardization of messages transmitted over radio channels. Police codes are used every day across the country to streamline and standardize communication between officers and dispatchers. Sep 15, 2017 · Taking the confusion out of monitoring Chicago crime with data-driven tools. . Contents Illinois State Police Codes Chicago Police Department Codes Chicago Taxi Codes Chicago Transit Authority Ten Codes Cook County Sheriff's Department Codes Dupage County Police Codes Elgin City Police Codes Kane County Sheriff's Department Signals Lake County Eleven Codes Park Forest Dispatch Signals Quincy & Adams County Police Codes A listing of known radio frequencies for the Chicago Police Department, Chicago Fire Department & select miscellaneous frequencies. xgtegva gfufx vehyf adq ance mzzqbjs jasjdy oomc avl bcbdx