In Brevard County Sheriff's Office, police "10 code" 10-42 means "Home" or the officer is out of service and he/she is at home.
Ten-codes, 10-codes, police codes and sometimes “police scanner codes” are signals that are used by law enforcement and government agencies in two-way voice radio communication as numeric code words for frequently used messages. Ten-codes are also used by private citizens in Citizen’s Band (CB) radio transmissions.
There is no truly universal or official set of 10 codes, and the meanings of a particular signals can vary between one police jurisdiction and another.
If you want to get anywhere on CB, you have to be prepared to talk trucker talk, and that can mean learning a lot of rules of conduct. The most important rule of conduct when using a CB radio is don’t take up more airtime than you have to on a crowded channel.
Check out some tips that will help you figure out how to get your codes in edgewise so you’re making friends and not enemies over the airwaves at Wearecb.com.