What do those 10 Codes mean?

"10-Codes" can be confusing to listen to on your scanner, but they help make our radio transmissions short and uniform. Although they may be modified for different agencies, the following codes are used in some way by most Illinois police departments - including the VHPD:
10-0 Caution
10-1 Unable to copy - change location
10-2 Signal good
10-3 Stop transmitting
10-4 Acknowledgement (OK)
10-5 Relay
10-6 Busy--stand by unless urgent Animated officer
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 Complete assignment quickly
10-19 Return to ______
10-20 Location
10-21 Call ______ by telephone
10-22 Disregard
10-23 Arrived at scene
10-24 Assignment completed
10-25 Report in person (meet) ______
10-26 Detaining subject; expedite
10-27 (Drivers) License information
10-28 Vehicle registration information
10-29 Check record for wanted
10-30 Illegal use of radio
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 (Investigate) suspicious vehicle
10-38 Stopping suspicious vehicle
10-39 Urgent--use light, siren
10-40 Silent run--no light, siren
10-41 Beginning tour of duty
10-42 Ending tour of duty
10-44 Request permission to leave patrol ______ for ______
10-45 Animal carcass in ______ lane at
10-46 Assist motorist
10-48 Traffic standard needs repairs
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 make written copy
10-64 Message 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
10-77 ETA (Estimated Time Arrival)
10-78 Need assistance
10-79 Notify coroner
10-80 Chase in progress
10-81 Breathalyzer report
10-82 Reserve lodging
10-83 Work school crossing at ______
10-84 If meeting ______ advise time
10-85 Delayed due to ______
10-86 Officer/operator on duty
10-87 Pickup/distribute checks
10-88 Advise present telephone number of ______
10-89 Bomb threat
10-90 Bank alarm at ______
10-91 Pick up prisoner/ subject
10-93 Blockade
10-94 Drag racing
10-95 Prisoner/subject in custody
10-96 Mental subject
10-97 Check (test) signal
10-98 Prison/jail break
10-99 Records indicate wanted or stolen