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13
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
better intelligibility 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
messa
g
e.
10-2 Your si
g
nal is
g
ood.
10-3 Stop transmittin
g
.
10-4 Messa
g
e 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 messa
g
e.
10-10 Ne
g
ative (No).
10-11 _____________ in service.
10-12 Stand by.
10-13 Report ___________ condi-
tions.
10-14 Information.
10-15 Messa
g
e delivered.
10-16 Reply to messa
g
e.
10-17 En route.
10-18 Ur
g
ent.
10-19 Contact __________.
10-20 My location is __________.
10-21 Call ________ by tele-
phone.
10-22 Cancel last messa
g
e.
10-23 Arrived at the scene.
10-24 Assi
g
nment complete.
10-26 Estimated time of arrival is
_________.
10-30 Use caution.
10-31 Pick up.
10-33 Emer
g
ency traffic. Clear the
channel.
10-34 The time is _____.
Code Meaning
21-1589.fm Page 13 Thursday, August 5, 1999 10:10 AM