13
USING COMMON 10-
CODES
Citizen’s band operators and CB radio
users have largely adopted the 10-
codes for standard questions and an-
swers. These codes permit faster com-
munication and better intelligibility in
noisy areas.
This table lists codes adopted by the As-
sociated Public Safety Communications
Officers (APCO).
Note:
Although this table lists the 10-
codes’ meanings in the form of a state-
ment, they can also be phrased as
questions (10-6: Are you busy?, 10-20:
What is your location?).
Code Meaning
10-1 Your si
nal is bad.
10-2 Your si
nal is
ood.
10-3 Stop transmittin
.
10-4
Messa
e received and under-
stood.
10-5 Relay information to _____.
10-6 I am busy or are you busy?
10-7 Out of service.
10-8 In service.
10-9 Repeat last messa
e.
10-10 Ne
ative (NO).
10-11 _____ in service.
10-12 Stand by.
10-13
Report road/weather condi-
tions.
10-14 Information.
10-15 Messa
e delivered.
10-16 Reply to messa
e.
10-17 En route.
10-18 Ur
ent.
10-19 Contact _____.
10-20 What is your location?
10-21 Call _____ by telephone.
10-22 Cancel last messa
e.
10-23 Arrived at the scene.
10-24 Assi
nment complete.
10-25 Meet _____.
10-26
Estimated time of arrival is
_____.
10-30 Use caution.
10-31 Pick up.
10-33
Emer
ency traffic. Clear the
channel.
10-34 What time is it?
10-41 Switch to Channel xx.
10-62 Cannot understand.
Code Meaning
21-1702.fm Page 13 Thursday, August 5, 1999 1:02 PM
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