Codes and Signals

Listed below are commonly used public safety codes and signals.
Some have been gathered from commonly available lists, others by monitoring radio transmissions.
Use of codes and signals is prohibited during multiagency or multidiscipline responses per NIMS.  
 
If you have corrections or additions for any code below, please submit them to us. 
 
 
Common 10-codes
 
Code Meaning
10-0
10-1 Weak Signal
10-2 Strong Signal
10-3 Stop Transmitting
10-4 Acknowledge
10-5 Relay
10-6 Busy-Unless Urgent
10-7 Out of service
10-8 In service
10-9 Repeat
10-10 Fight In Progress
10-11 Dog Case
10-12 Stand By (Stop)
10-13 Weather-Road Report
10-14 Prowler Report
10-15 Civil Disturbance
10-16 Domestic Problem
10-17 Meet Complainant
10-18 Quickly
10-19 Return to _____
10-20 Location
10-21 Call ( ) by Phone
10-22 Disregard
10-23 Arrived at Scene
10-24 Assignment Completed
10-25 Report in Person (Meet)
10-26 Detaining Subject
10-27 Drivers License Info
10-28 Vehicle Registration Info
10-29 Check for Wanted
10-30 Excess Radio Traffic
10-31 Crime in Progress
10-32 Man with Gun
10-33 Emergency
10-34 Riot
10-35 Major Crime Alert
10-36 Correct Time
10-37 Suspicious Vehicle
10-38 Stopping the Suspicious
10-39 Urgent-Use Light / Siren
10-40 Respond No Light / Siren
10-41 Beginning Tour of Duty
10-42 Ending Tour of Duty
10-43 Information
10-44 Permission to Leave ___
10-45 Animal Carcass at ___
10-46 Assist Motorist
10-47 Emergent Road Repair
10-48 Traffic Standard Repair
10-49 Traffic Light Out at ___
10-50 Accident(F, PI,PD)
10-51 Wrecker Needed
10-52 Ambulance Needed
10-53 Road Blocked at ___
10-54 Livestock on Highway
10-55 Intoxicated Driver
10-56 Intoxicated Pedestrian
10-57 Hit and Run (F, PI, PD)
10-58 Direct Traffic
10-59 Convoy or Escort
10-60 Squad in Vicinity
10-61 Personnel in Area
10-62 Reply to Message
10-63 Prepare to Copy
10-64 Msg for Local Delivery
10-65 Net Message Assignment
10-66 Message Cancellation
10-67 Clear for Net Message
10-68 Dispatch Information
10-69 Message Received
10-70 Fire Alarm
10-71 Advise Nature of Fire
10-72 Report Progress on Fire
10-73 Smoke Report
10-74 Negative
10-75 In Contact with ___
10-76 En Route ___
10-77 ETA
10-78 Need Assistance
10-79 Notify Coroner
10-80 Chase in Progress
10-81 Breatherlizer Report
10-82 Reserve Lodging
10-83 Work School Crossing at:
10-84 If Meeting __Advise ETA
10-85 Delay due to ___
10-86 Officer/Operator on Duty
10-87 Pickup/Distribute Checks
10-88 Present Telephone # of:
10-89 Bomb Threat
10-90 Bank Alarm at ___
10-91 Pick Up Prisoner
10-92 Improper Parking
10-93 Blockade
10-94 Drag Racing
10-95 Subject in Custody
10-96 Mental Subject
10-97 Check (Test) Signal
10-98 Prison / Jail Break
10-99 Wanted / Stolen Indicated



Fire / EMS Response Codes
 
 
EMS Responses (priority system)
Level Provider Response
Alpha BLS  Non-emergent
Bravo  BLS  Emergent 
Charlie  ALS  Non-emergent 
Delta  ALS  Emergent 
Echo   Expedite
 
  
Code 1  emergent response
Code 2  non-emergent response
Code 3  emergent response 
Code 4 situation secure
 Use of code 1 or 3 depends on jurisdiction
 
 
 
Staging Types  
 Level 1 - staged on scene
 Level 2 - staged away from scene
  
  
 
IDOT Road Codes 
 
Code 1  clear
Code 2  slippery spots

Code 3  25% covered
Code 4  50% covered
Code 5  75% covered
Code 6  100% Scovered
 
 IDOT TMA =
Truck Mounted (crash) Attenuator
Illinois State Police
 
 
Response Codes
1 - Normal
2 - Expeditious
3 - Emergent 
 
Disposition Codes 
1 - DUI
2 - Speeding 
3 - Seat belt
4 - Following too closely 
5 - Improper lane usage
Assisted motorist
Assisted other agency
 
 
 
Patrol Status 
Patrol interstate
Patrol other
Patrol weather
Patrol 2nd division
Training probationary
Department lands (DNR)
Overweight vehicle
Supervisory patrol
Investigative duties
 
 
 
 Misc. Verbage
Incident initiation 
Incident update 
Contact secure 
Location update
Equipment maintenance
In transit / QIT
Personal time
Time earned
Watchdog (## mins) [D15]
Milepost ##

 

Unit Types 
Ocean - crash reconstruction
Frank - conservation
David Adam - OSFM
Lincoln - Aviation
Paul - ISP Airplane ops 
Mary - ISP Motorcycles
Henry - IDOT Helo

   

ISP Alert Tones
Alert 2468.2 / 2137.0
D11 ISPERN 1050.0
Weather 2440.0 / 1780.0
Situation 2440.0 / 2840.0