Field reference · Trucking

CB Radio — Trucker's Handbook

All 40 CB channels with their frequencies, the complete 62-code 10-code reference, and 100+ slang terms — for truckers, off-roaders, overlanders, RV travelers, and anyone who just bought their first radio.

CB is a skill: knowing which channel to monitor, what a code means the moment you hear it, and how to speak the language of the road. That used to take years of road time to pick up. It works with no signal, because a radio doesn't need one either.

Download on the App Store What's inside
40 channels 62 ten-codes 100+ slang terms Works offline $1.99 one-time
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What's inside

$1.99 once. No subscription, no ads, no account. Everything is built into the app, so it works on the interstate, on the trail, and anywhere cell coverage gives out.

Channels All 40 CB channels Every channel with its exact frequency in MHz, common usage, and channel type — flagged where it matters: emergency, main, SSB, off-road. FCC Part 95
Tuning Retro tuning dial Drag the dial to scan the band, or tap a neighbouring channel to jump. Snap animation and haptics, the way a real knob behaves. Channels tab
10-codes Complete 10-code reference All 62 standard codes in plain English. Search by code or by meaning, and star the ones you use so they stay at the top. 62 codes
Slang Trucker slang glossary 100+ terms from Bear to Hammer Down, Chicken Coop to Motion Lotion — alphabetical, searchable, and no longer a blank look when someone calls you a Kojak with a Kodak. A–Z
Quick ref Six reference cards Emergency codes, bear and police calls, radio operation, road conditions, trucking essentials, and greetings — the things you need fast, not the things you need eventually. Quick Ref tab
Display Amber LCD, on purpose Built to read like the hardware it documents: amber display, LCD typeface, signal bars, and a dark interface that won't blind you in a night cab. Night-legible
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Four tabs

Channels is the one you live in. The other three are where you go when you need the detail.

CB Radio Channels tab: channel 19 at 27.185 MHz shown on a tuning dial, labelled the primary trucker channel for East/West highway traffic, with frequency, common use, type and notes listed below.
CH Channels
CB Radio 10-Codes tab: a search for "loc" returning 10-16 make pickup at location, 10-20 my location is, 10-37 wrecker needed, 10-38 ambulance needed and more, each with a star to save it.
10- 10-Codes
CB Radio Slang tab: a search for "bea" returning Bear, Bear Bait, Bear Bite, Bear in the Bushes and Polar Bear, each with a plain-English definition.
A–Z Slang
CH Channels The tuning dial and all 40 channels, with an info panel giving frequency, type and usage notes for each.
10- 10-Codes The full searchable code list. Favourites persist between sessions, so the codes you actually use stay one tap away.
A–Z Slang & Lingo 100+ terms, alphabetical, with section headers for scanning and search for when you only caught half of it.
★ Quick Reference Six curated cards for the situations that actually come up — emergencies, traffic stops, road conditions, greetings.
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On the air

CB runs on 40 channels between 26.965 and 27.405 MHz. A handful of them carry most of the traffic, and which one you monitor depends on where you are and what you drive.

Channels worth knowing
Channel Frequency Use
4 27.005 MHz Off-road and overland groups
9 27.065 MHz FCC-reserved for emergencies only — not for general conversation
13 27.115 MHz RV travelers and marine use
17 27.165 MHz North/south routes
19 27.185 MHz Primary trucker channel — east/west interstate traffic, road conditions, bear reports
21 27.215 MHz Regional and local roads
36–40 27.365–27.405 MHz SSB-capable, for operators running single sideband
Channel 9

Channel 9 is reserved by the FCC for emergency communications and traveler assistance. It's monitored by REACT volunteers and some agencies. Keep it clear.

04

Get it

$1.99, once. No subscription, no ads, no in-app purchases, no account.

40 channels 62 ten-codes 100+ slang terms Works offline iOS
Download on the App Store Support
05

Questions

What are the 40 CB radio channels?

CB radios operate on 40 designated channels between 26.965 MHz (Channel 1) and 27.405 MHz (Channel 40). Channel 9 is FCC-reserved for emergency communications only. Channel 19 is the standard trucker channel on US interstates. Channels 36–40 are SSB-capable. The app lists all 40 with frequencies, usage notes, and flags for the special ones.

What channel do truckers use on CB radio?

Channel 19 (27.185 MHz) is the primary trucker channel on most US interstates for east/west highway traffic. Channel 17 is used for north/south routes, and Channel 21 for regional roads. Channel 9 is reserved for emergency use only and shouldn't be used for general conversation.

What does 10-4 mean in CB radio?

10-4 means "OK, message received" — an acknowledgment that you heard and understood the transmission. It's the most commonly used 10-code. The app includes all 62 standard codes with plain-English meanings and a search.

Does this app work offline?

Yes, completely. All the data is built into the app — no internet connection required. It works wherever you take the radio: interstates, off-road trails, campgrounds, and anywhere cell coverage disappears.

Who is this app for?

Truckers, off-roaders, overlanders, RV travelers, preppers, and road trip enthusiasts. Anyone who operates a CB or wants to understand what they're hearing on one — whether you've run a radio for thirty years or picked up your first one last week.

Is there a subscription?

No. $1.99 one-time purchase — no subscription, no ads, no in-app purchases.

06

More

App HazMat Pro The other one built for the cab: DOT placards, UN numbers, and ERG guide numbers, offline. 49 CFR · ERG → Help Support Something wrong, or a channel assignment that doesn't match your region? Tell me. → Legal Privacy policy Short version: the app doesn't collect anything. →
Disclaimer

CB Radio — Trucker's Handbook is an independent reference app, not affiliated with the FCC, REACT International, or any CB radio manufacturer. Channel assignments and 10-code definitions follow standard US CB conventions; regional usage varies. Always follow FCC regulations when operating a CB radio.