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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