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12
Using Common 10-Codes
Citizen’s band operators have largely
adopted the 10-codes for standard
questions and answers. These
codes permit faster communication
and better intelligibility in noisy ar-
eas.
These tables list the codes adopted
by the Associated Public Safety
Communications Officers (APCO).
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 or are you
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 ____________
conditions.
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 What is your location?
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 What time is it?
Code Meaning
21-1701.fm Page 12 Thursday, August 5, 1999 12:50 PM