Police code

 
A police code is a numerical brevity code for a crime, incident, or instructions for police officers.
United States.
California.
The Hundred Code is a three digit police code system. This code is usually pronounced digit-by-digit, using a radio alphabet for any letters, as 505 "five zero five" or 207A "two zero seven Alpha". The following codes are used in California. They are from the California Penal Code except where noted below.
In the 1970s, the television show "Adam-12" was considered so authentic in its portrayal of Los Angeles PD officers and their procedures that excerpts from the shows were used as police training films around the country. This led to widespread use of California Penal Codes as radio codes.
"500" codes are only radio codes that substitute for other code sections. For example, a "503" is not Penal Code section 503 (embezzlement). All of the "500" codes, generally, involve vehicles and are thus grouped together (except 594, which is an actual Penal Code section). Additionally, "390" and variants are also radio codes only (CPC 647(f) is the legally enforced section "public intoxication").
In California, some radio codes in the 400–599 range that refer to vehicle violations are left over from the California Vehicle Code (CVC) which was revised in 1971. Some agencies, such as the California Highway Patrol (CHP) use the current vehicle code numbers while municipal and county police agencies, especially the Los Angeles Police Department (LAPD) still use the 500 series. 
Texas.
Austin.
The following codes are used in Austin, Texas.