business and economics | May 15, 2026

What does it mean 10 4?

10-4 is an affirmative signal: it means “OK.” The ten-codes are credited to Illinois State Police Communications Director Charles Hopper who created them between 1937–40 for use in radio communications among cops.

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Hereof, what is the opposite of 10 4?

Police 10 Codes

Code General Purpose APCO (Association of Police Communications Officers)
10-2 Signal Good Signal Good
10-3 Stop Transmitting Stop Transmitting
10-4 Acknowledgment (OK) Affirmative (OK)
10-5 Relay Relay To/From

Also Know, what is a code 4? Code 4 Meaning Code 4” means everything is under control or the scene is safe.? It indicates the officers are now in charge of the situation they were called to.

Besides, what is your 10 20 mean?

10-20. Denotes location, as in identifying one's location ("My 20 is on Main Street and First"), asking the receiver what their current location or destination is ("What's your 20?"), or inquiring about the location of a third person ("Ok, people, I need a 20 on Little Timmy and fast").

What are the 10 codes for radio?

10-Radio Codes

  • 10-1 Receiving Poorly.
  • 10-2 Receiving Well.
  • 10-3 Stop Transmitting.
  • 10-4 Acknowledgement.
  • 10-5 Relay.
  • 10-6 Busy.
  • 10-7 Out of Service.
  • 10-8 In Service.
Related Question Answers

What does a 10 2 mean?

10-2 means "Radio code for 'Receiving well'" So now you know - 10-2 means "Radio code for 'Receiving well'" - don't thank us.

What does 5by5 mean?

Five by five is the predecessor to the term "Loud and Clear" or "Lima/Charlie" used by military units today. It found its way into verbal slang, meaning "everything is good" or "everybody is well/good".

What does Code 2 mean?

Code 2: An acute but non-time critical response. The ambulance does not use lights and sirens to respond.

What does 104 mean for cops?

10-4 means "understood". The Ten-Signal "code" was developed in Illinois in the late 1930's to reduce speech on the radio frequency.

What does it mean 10 1?

The Meaning of 10-1 10-1 means "Radio code for 'Receiving poorly'" So now you know - 10-1 means "Radio code for 'Receiving poorly'" - don't thank us.

What does 10 10 mean on the radio?

Ten radio codes. "TEN" RADIO CODES. 10-1. Receiving poorly, bad signal.

What does code 8 mean?

code 8 means "parents are watching"

What is a 10 10 code?

Ten-code. Ten-codes, officially known as ten signals, are brevity codes used to represent common phrases in voice communication, particularly by law enforcement and in Citizens Band (CB) radio transmissions. The police version of ten-codes is officially known as the APCO Project 14 Aural Brevity Code.

Why do they say watch your six?

Your intuitions are correct; the phrase 'watch your six' does indeed mean 'watch your back'. It refers to the 6 position on the face of a clock. If you were standing in the center of a clock face, facing the 12 position, the 6 position would be immediately behind you.

What does it mean to have a 20 on someone?

It means “Where are you?” . “What's your twenty?” comes from “10–20” (ten-twenty) which is part of the Ten Code used by C.B.ers borrowed and adapted from the police and emergency services. “What's your twenty?” comes from the days of Citizens' Band Radio. It means “Where are you?” .

What does a 10 42 mean?

One “Ten Code” that is not as familiar to the general public is “10-42”. This particular code is used to indicate an officer's end of tour. When a law enforcement officer is killed in the line of duty, there are often federal and state benefits that are directed to the officer's family.

What does Roger that mean?

In the previously used US spelling alphabet, R was Roger, which in radio voice procedure means "Received". In the US military, it is common to reply to another's assertion with "Roger that", meaning: "I agree".

What does 42 mean in trucker talk?

42. Yes, or OK. Four-Letter Word. Nobody wants to stop at the weigh station- that is why "OPEN" is considered a four-letter word in the trucking industry. When the weigh station is open.

What are some trucker sayings?

Trucker Slang: Top 20 Funny Sayings July 13 2017
  • Town Clown—Local Police Officer.
  • Motion Lotion—Fuel.
  • Skate Board—Flat Bed Trailer.
  • Jumpy Juice—Coffee.
  • Wiggle Wagon—Truck with More Than One Trailer.
  • Organ Donor—Motorcyclist without a Helmet.
  • Salt Shaker—Snow Plow.
  • Gator Guts—Shredded Tire in the Road.

What does on your six mean?

If someone's got your six, it means they've got your back. This expression comes from the placement of numbers on an analog clock, and appears to have originated with military pilots.

What is a good buddy?

the operator of a CB radio; fellow operator (often used as a form of direct address while broadcasting). Informal. a trusted companion or colleague; friend.

What does 10 10 on the side mean?

It means that they "will cease broadcasting but will continue to listen".

What does code 7 mean?

Code 3 Use lights and siren. Code 4 No further assistance needed. Code 5 Stakeout. Code 6 Stay out of area. Code 7 Meal break.

What does Code 9 mean?

Code 9: a systematic approach for responding to medical emergencies occurring in and around a hospital. Members of the public expect to receive efficient and appropriate medical care if they become acutely ill or injured while in or around a hospital.