What does "10-4" really mean?

Asked by: Emery Hand  |  Last update: June 20, 2026
Score: 4.9/5 (67 votes)

"10-4" is a radio code that means "message received," "understood," or "okay". It is used to acknowledge that a transmission was heard and understood, functioning as a quick confirmation in communication.

What does 10/5 mean in code?

10-5 = Relay message to ___ 10-6 = Busy, please stand by. 10-7 = Out of service, leaving the air. 10-8 = In service, subject to call. 10-9 = Repeat message.

What does 22 mean in cop terms?

The slang term "12" (or sometimes "22" in specific international contexts) for police officers generally refers to law enforcement presence or radio codes. The term is most often traced back to the 1960s TV show Adam-12, radio codes for officers being present, or specialized street slang, particularly in Atlanta, Georgia.

Why do truckers say what's your 20?

Truckers say, “What's your 20?” to ask where other truckers are during long trips. It helps them stay safe and stay connected on the road. The phrase started as part of CB radio slang and is now a common way for truckers to check each other's locations."

What is the actual meaning of 10 4?

When someone says "10-4" on a radio or during a conversation, they are essentially saying, "I understand" or "Message received." It is a way to quickly acknowledge that the information or instruction has been received and comprehended.

What Does 'Ten-Four' Mean? | Origins, Meaning, and Examples of '10-4' in Radio Communication.

30 related questions found

What's a 10/7 in cop terms?

In police code, 10-7 generally means "out of service" or "off duty," indicating that an officer or unit is unavailable for calls. It is commonly used for lunch breaks, end-of-shift, or personal business, and in some contexts, it is used as a somber, unofficial term for a deceased person.

What is the 3-3-3 rule for radios?

The 3-3-3 Radio Plan is a widely used survivalist and emergency communication protocol designed for when traditional communication systems (phone, internet) fail. It dictates that users turn on their radio every 3 hours to listen for 3 minutes on Channel 3 to contact others, helping to conserve batteries while keeping a consistent schedule.

What does "what's your 6" mean?

"What's your 6" (or "got your 6") is a military-origin phrase meaning "I've got your back" or "I am watching out for you". It stems from the analog clock system where 12 o'clock is forward and 6 o'clock is directly behind you. It signifies protection, support, and trust.

What does a 420 girl mean?

A "420 girl" is slang for a woman who consumes cannabis, is "420-friendly" (accepting of marijuana use), or is involved in the cannabis culture. The term stems from "420," a global,, 1970s-origin slang for smoking weed, particularly around 4:20 p.m. or on April 20th.

What is a 34 for truckers?

A "34" in trucking refers to a 34-hour restart (or reset), a voluntary, consecutive 34-hour off-duty period that allows commercial drivers to reset their weekly Hours of Service (HOS) clock. It is used to replenish the 60 or 70 hours allowed to be worked over 7 or 8 consecutive days, respectively, ensuring drivers remain rested and compliant.

What does 1042 mean in cop code?

Police officer retirement (North America)

The officer gives a 10-7 code (Out of service) and then a 10-42 code (ending tour of duty).

What is a 72 cop code?

10-70 Prowler. 10-71 Shooting. 10-72 Knifing.

What does 415 mean in cop terms?

California Penal Code (CPC) §415 – Disturbing The Peace – In California, the crime of Disturbing The Peace occurs under three circumstances: 1) whenever people fight (or someone challenges another person to fight) unlawfully in public; 2) whenever a person willfully disturbs another with loud and unreasonable noise; or ...

Which state has no state police?

Hawaii is the only state in the United States that does not have a primary or statewide law enforcement agency.

What is the 10 code for dead body?

Many agencies use the 10 code “10-67" to report a death. The code “10-66" also means “notify medical examiner.”

How to write "I love you" in coding?

I love you in X languages.rst

  1. #include <stdio.h> int main() { printf("I love you\n"); return 0; }
  2. #include <iostream> int main() { std::cout<<"I love you"<<std::endl; return 0; }
  3. public class ILoveU{ public static void main(String[] args) { System. ...
  4. #!usr/bin/python print "I love you"
  5. #! ...
  6. $ perl -e 'print "I love you!\n"'

Why does Elon Musk like the number 420?

Musk testified during a trial that any associations with cannabis were coincidental; however, in the SEC filing, he admitted that he had recently discovered the number's importance within the cannabis culture and thought his girlfriend would find it funny.

What does 710 mean on Tinder?

710-friendly means that a person or place is open to the consumption and use of cannabis concentrates, such as oils, distillates, and resins.

What does "520 friendly" mean?

To put it plainly, being "4/20 friendly" refers to an individual or establishment's acceptance or endorsement of cannabis consumption. This cryptic phrase serves as a signal, indicating a space or person is comfortable with the presence of marijuana or cannabis-related activities.

What does Charlie Foxtrot mean?

Charlie Foxtrot = Cluster F***

“Charlie Foxtrot” is a term for a chaotic or disastrous situation, often caused by mismanagement or poor coordination. In military operations, it might describe a botched mission or a supply chain error that results in complete disorder.

Why do cops say watch my 6?

The phrase “got your 6” is a military and law enforcement expression that originated from aviation. It is a way of saying, “I've got your back” or “I'm watching out for you.” In this context, “6” refers to the six o'clock position, which is directly behind a person when facing forward.

Which country in NATO has no military?

Iceland is the only NATO nation with no standing armed forces. As a founding member since 1949, it maintains security through its membership, a militarized Coast Guard, and a 1951 bilateral defense agreement with the United States.

Why can't you say "repeat" in the military?

In the military, you cannot use the word "repeat" over the radio because it is a specific artillery procedure word (proword) instructing guns to fire again on the same target. Using it to mean "say again" can cause accidental, dangerous, or fratricidal artillery strikes. The correct phrase is "say again".

Why is 1420 MHz forbidden?

1420 MHz is forbidden for terrestrial transmission because it is a protected spectrum dedicated to radio astronomy. It corresponds to the natural emission frequency of hydrogen—the most abundant element in the universe—and is used to detect cosmic radio signals, meaning ground-based transmissions would jam these sensitive observations.

What does 72 mean in ham radio?

In ham radio, 72 is a code used specifically by QRP (low-power) operators to mean "best regards" or "best QRP wishes". Similar to 73, which is the standard sign-off for "best regards," 72 has been used since the late 1980s as a friendly greeting or "handshake" between operators using 5 watts or less.