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Police Codes and References

Listening to a Police scanner feed can be a little confusing at times.

Police departments use a variety of codes for identification and to relay information. This eliminates the need for an 'on air explanation'. Two commonly used sets of codes are the "10 codes" and "900 codes". For example, 10-4 means "Message Understood", and if police are told to respond to a 935, they are responding to a possible "Intoxicated Person". (See a complete list below)

If you determine there are errors or any additions to the information below, and you wish to contribute, please submit an email. Thank you.


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900 Bomb threat 924 Fire 948 Suspicious vehicle 972 Motorcycle complaint
901 Homicide 925 Theft alarm 949 Arrest 973 By-law complaint
902 Sudden death 926 Assist citizen 950 Property accident 974 Check premises
903 Attempted suicide 927 Help other police service 951 Accident person injured 975 Paid duty
904

Sex offense

 928 Check well-being 952 Hit and run accident 976 Follow up
905 Indecent act 929 Harassing phone call 953 Accident - fatality 977 Arrest on warrant
906 Threatening 930 Disturbance 954 Traffic enforcement 978 Arson
907 Assault 931 Landlord-tenant dispute 955 Driving complaint 979 Theft under $5000
908 Abduction 932 Neighbor dispute 956 Traffic control 980 Routine detail
909 Robbery 933 Domestic dispute 957 Impaired driver 981 Provincial alert
910

Extortion

 934 Labor dispute 958 High speed chase 982 Zone alert
911 Break and enter 935 Intoxicated person 959 Parking complaint 983 Administrative alert
912 Theft 936 Unwanted person 960 Abandoned vehicle 984 Missing adult located
913 Auto theft 937 Mentally ill person 961 Liquor offense 985 Missing juvenile located
914 Possess stolen property 938 Public mischief 962 Animal complaint 986 Property returned
915 Fraud 939 Dangerous condition 963 Noise complaint 987 Stolen vehicle recovered
916 Counterfeiting 940 Industrial accident 964 Escort 988 Vehicle break and enter
917 Weapon 941 Farm accident 965 Juvenile offense 990 Stalking
918 Property damage 942 Insecure location 966 Probation offense 991 Internet crime
919 Prostitution 943 Lost property 967 Search warrant 992 Graffiti related
920 Gambling 944 Found property 968 Shoplifting complaint 993 Domestic - other
921 Drugs 945 Trespassing 969 Injured person 994 Elder Abuse
922 Missing person 946 Prowler 970 Missing juvenile 997 Pornography
923 Escape 947 Suspicious person 971 Privately towed vehicle 998 Remove Belongings
 
Below are the "10 codes". You will hear a minor variation in the use of the words 10-4. 10-4 means "message understood", however, it is also used to confirm that an officer is alright, and the situation is stable.

You will hear a dispatcher say, "is everything 10-4 there?", or "are you 10-4?" The dispatcher is not interested in whether the message was understood, but wants to know if the officer is safe, and has everything under control.
 
10-1 Receiving poorly 10-7

Out of service

 10-21 Call by telephone 10-63 Subject wanted
10-2 Receiving well 10-8 In service 10-33 Emergency 10-64 Proceed with caution
10-3 Stop transmitting 10-9 Repeat message 10-36 Correct time 10-65 Assist with 10-64
10-4 Message understood 10-10 Switch common channel 10-60 Subject negative 10-66 Observation category
10-5

Relay message

 10-19 Return to station 10-61 Has record - not wanted 10-67 Parolee category
10-6 Busy - stand by 10-20 What is your location? 10-62 Subject possibly wanted 10-68 Charged category
 
You will often hear a police dispatcher refer to a C-N-I (Criminal Name Index). A "positive C-N-I" means the person in question has been listed in the CNI police computer system with certain "Flags" (see below). Other information from a C-N-I is usually clearly explained by a dispatcher.
 
Flag A Believed Armed Flag C Believed Contagious Flag E Escape Risk Flag F Family Violence
Flag M Believed to be Mentally Ill Flag R Unknown Flag S Believed Suicidal Flag V Believed Violent
 

The Region of  Waterloo Police units communicate using individual designations. All known designations are listed below. The first letter, number or word lets you know their association within the police department.

For example, if the dispatcher makes a call to unit "South 11C", you know they are contacting a unit from the Cambridge Division. All unit designations starting with the word "South" are being handled by the Cambridge Division. See the entire list below.

Some of these designation may be combined together. A call sign starting with the letter "S" indicates a Sergeant. However, when combined with "Central" (example  "Central S23") , you know the dispatcher is contacting a Sergeant  from the Kitchener (Central) Division.
 

Central xxx Kitchener Division
South xxx Cambridge Division 
North xxx Waterloo Division
Romeo xxx Rural unit
4xx Summons Officers
5xx

Traffic (including R.I.D.E. Patrols)
6xx Detectives
7xx Identification (Forensic Identification Units)
8xx Homicide/Major Case?
9xx K9 Units. Foot patrols may be included in this unit designation
19xx Special Events/Paid Duty/etc (Kitchener)
29xx Special Events/Paid Duty/etc (Cambridge)
39xx Special Events/Paid Duty/etc (Waterloo)
Axxx Auxiliary Officer (usually on talkgroup Special Events 1 or 2 )
ASxxx Auxiliary Sergeant (usually on talkgroup Special Events 1 or 2 )
BCxx Bylaw Cambridge
BKxx Bylaw Kitchener
BWxx Bylaw Waterloo
ERxx Emergency Response
MCxx Motorcycle Unit
MPx Mounted (horseback)
Sxx Sergeant
SRxx School Resource
TBxx Trail Bike (Bylaw Units)
   
Again, if you determine there are errors or additions to the information above and you wish to contribute, please send an email. Many thanks.
 

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