Police and other agencies use 10 codes to verbally communicate efficiently. The word ten (10) indicates the next number, or numbers, is code.
| 10-0 | Use Caution | |
| 10-1 | Signal Weak | |
| 10-2 | Signal Good | |
| 10-3 | Stop Transmitting | |
| 10-4 | Affirmative (OK) | |
| 10-5 | Relay To/From | |
| 10-6 | Busy | |
| 10-7 | Out of Service | |
| 10-8 | In Service | |
| 10-9 | Say Again | |
| 10-10 | Negative | |
| 10-11 | ___ On Duty (Employee Number) | |
| 10-12 | Stand By (Stop) | |
| 10-13 | Weather Conditions | |
| 10-14 | Message/Information | |
| 10-15 | Message Delivered | |
| 10-16 | Reply to Message | |
| 10-17 | Enroute | |
| 10-18 | Urgent | |
| 10-19 | (In) Contact | |
| 10-20 | Location | |
| 10-21 | Call ( ) by Phone | |
| 10-22 | Disregard | |
| 10-23 | Arrived at Scene | |
| 10-24 | Assignment Completed | |
| 10-25 | Report to (Meet) | |
| 10-26 | Estimated Arrival Time (ETA) | |
| 10-27 | License / Permit Information | |
| 10-28 | Vehicle Information | |
| 10-29 | Records Check | |
| 10-30 | Danger / Caution | |
| 10-31 | Pick Up | |
| 10-32 | ___Units Needed (Specify) | |
| 10-33 | Need Immediate Assistance | |
| 10-34 | Current Time | |
| 10-35 | ||
| 10-36 | ||
| 10-37 | ||
| 10-38 | ||
| 10-39 | ||
| 10-40 | Fight in Progress | |
| 10-41 | Beginning Tour of Duty | |
| 10-42 | Ending Tour of Duty | |
| 10-43 | In Pursuit | |
| 10-44 | Riot | |
| 10-45 | Bomb Threat | |
| 10-46 | Bank Alarm | |
| 10-47 | Complete Assignment Quickly | |
| 10-48 | Detaining Suspect, Expedite | |
| 10-49 | Drag Racing | |
| 10-50 | Vehicle Accident (F-Fire, PI-Personal Injury, PD-Property Damage) | |
| 10-51 | Dispatch Wrecker | |
| 10-52 | Dispatch Ambulance | |
| 10-53 | Road Blocked | |
| 10-54 | Hit and Run Accident (F-Fire, PI-Personal Injury, PD-Property Damage) | |
| 10-55 | Intoxicated Driver | |
| 10-56 | Intoxicated Pedestrian | |
| 10-57 | Request BT Operator | |
| 10-58 | Direct Traffic | |
| 10-59 | Escort | |
| 10-60 | Suspicious Vehicle | |
| 10-61 | Stopping Suspicious Vehicle | |
| 10-62 | B and E in Progress (Breaking & Entering) | |
| 10-63 | Prepare to Receive an Assignment | |
| 10-64 | Crime in Progress | |
| 10-65 | Armed Robbery | |
| 10-66 | Notify Medical Examiner | |
| 10-67 | Report of Death | |
| 10-68 | Livestock in Roadway | |
| 10-69 | Advise Telephone Number | |
| 10-70 | Improper Parked Vehicle | |
| 10-71 | Improper Use of Radio | |
| 10-72 | Prisoner in Custody | |
| 10-73 | Mental Subject | |
| 10-74 | Prison / Jail Break | |
| 10-75 | Wanted or Stolen | |
| 10-76 | Prowler | |
| 10-77 | Direct Traffic at Fire Scene | |
| 10-78 | ||
| 10-79 | ||
| 10-80 | Fire Alarm | |
| 10-81 | Nature of Fire | |
| 10-82 | Fire in Progress | |
| 10-83 | Smoke Visible | |
| 10-84 | No Smoke Visible | |
| 10-85 | Respond without Blue Lights / Siren | |