9
USING COMMON 10-
CODES
Citizen’s band operators have largely
adopted the 10-codes for standard
questions and answers. Their use
permits faster communication and
helps prevent misunderstanding in
noisy areas.
This table lists the codes adopted by
the Associated Public Safety Com-
munications Officers (APCO).
Note: Although this table lists the 10-
codes’ meanings in the form of a
statement, they can also be phrased
as questions (10-6: Are you busy?,
10-20: What is your location?).
Code Meaning
10-1
Cannot understand your
message.
10-2
Your signal is good.
10-3
Stop transmitting.
10-4
Message received and
understood.
10-5
Relay information to
_________.
10-6
I am busy.
10-7
Out of service.
10-8
In service.
10-9
Repeat last message.
10-10
Negative (No).
10-11
__________ in service.
10-12
Stand by.
10-13
Report ___________
conditions.
10-14
Information.
10-15
Message delivered.
10-16
Reply to message.
10-17
En route.
10-18
Urgent.
10-19
Contact __________.
10-20
My location is _______.
10-21
Call ____ by telephone.
10-22
Cancel last message.
10-23
Arrived at the scene.
10-24
Assignment complete.
10-26
Estimated time of arrival
is ____.
10-30
Use caution.
10-31
Pick up.
10-33
Emergency traffic. Clear
the channel.
10-34
The time is _____.
Code Meaning
21-1588.fm Page 9 Thursday, August 5, 1999 10:05 AM
