Cambodia country code, +855 explained.
Everything you need to call Cambodia with Twiching — full dialing format, step-by-step guide, and Tier-1 CLI routes that land every call.
Cambodia
Phnom Penh · Asia
· COUNTRY INFO · VERIFIED
- ISO Alpha-2
- KH
- Capital
- Phnom Penh
- Region
- Asia
- Timezone
- UTC+7
· DIALING GUIDE · VERIFIED
FULL DIAL FORMAT
011 · +855 · XX · XXXXXXX
How Cambodia numbers break down
A complete number to Cambodia follows this pattern. Twiching adds the exit and country codes automatically when you dial from the app.
EXIT CODE
Dial from the US/Canada to leave the country.
COUNTRY CODE
Routes the call directly into Cambodia.
AREA / MOBILE
Regional or mobile prefix — drop the leading 0.
LOCAL NUMBER
The subscriber's local number.
COMPLETE NUMBER FORMAT
011 · +855 · XX · XXXXXXX
Cambodia on the map
Phnom Penh · Asia
ROUTE
Tier-1 Direct
CLI
Verified
ASR
60%+ min
How to call Cambodia
Click any step — watch the full dial string build piece by piece.
FULL NUMBER FORMAT
011 · +855 · XX · XXXXXXX
Twiching automatically adds the exit and country codes — just enter the local number.
Cambodia —
connected across every carrier.
191
Countries in directory
CAMBODIA INCLUDED
99.97%
Call delivery rate
STIR/SHAKEN
500+
Carrier interconnects
TIER-1 DIRECT
60%+
Guaranteed ASR
REAL-TIME ROUTING
Cambodia
Asia · KH
Cambodia numbering plan & how to dial
Under country code +855, Cambodia numbers follow an open plan built from a 2-digit area or mobile prefix and a 7-digit subscriber line — 9 digits in all. A domestic "0" typically precedes the prefix, but that digit is dropped when dialing Cambodia internationally.
3 major networks cover Cambodia (Cellcard, Smart Axiata, Metfone), against 60% internet penetration. VoIP is permitted and regulated by Ministry of Posts and Telecommunications (MPTC). Because Khmer is the primary language and KHR the local currency, both should inform IVR scripts, SMS content, and support hours.
Asian markets range from fully liberalised to licensed-only VoIP, so compliant routing and correct local caller ID have an outsized effect on answer rates.
Skipping the exit code
Cambodia calls from the US need 011 first, then +855 — the exit code isn't optional.
Keeping the national trunk "0"
Cambodia numbers often show a domestic leading 0 — drop it once you've dialed the +855 country code from outside the country.
Ignoring the time difference
Cambodia runs on UTC+7. Check local hours before dialing so calls don't land outside business time.
Permitted — MPTC regulated
Regulated by Ministry of Posts and Telecommunications (MPTC)
- VoIP services require a concession or license issued by MPTC.
- Unauthorized international VoIP gateways are prohibited under telecom law.
- Operators must comply with lawful interception and data retention regulations.
US → Cambodia
$0.018/min
per minute
Cambodia → US
$0.020/min
per minute
Business calling to Cambodia
Local KH caller ID
Present a Cambodia +855 number so prospects in Phnom Penh and nationwide recognise the call and are more likely to answer.
Asia outbound & support
Run sales and support lines into Cambodia over Tier-1 routes that interconnect with networks like Cellcard.
Follow-the-sun coverage
Staff Cambodia hours (UTC+7) with routing that sends calls to the right team at the right local time.
FAQ
Calling Cambodia — frequently asked questions
Khmer is the primary language in Cambodia — IVR prompts, SMS copy, and support scripts should be written in it for the best response rates. Getting the greeting and menu options right in the local language is often the difference between a caller staying on the line or hanging up.
Calls from the US to Cambodia start at $0.018/min on Twiching, billed per second on Tier-1 routes. That's the same rate whether the call lands on a mobile or fixed-line number in the country.
Asian markets range from fully liberalised to licensed-only VoIP, so compliant routing and correct local caller ID have an outsized effect on answer rates. In Cambodia specifically, that's overseen by Ministry of Posts and Telecommunications (MPTC), which sets the compliance bar Twiching's routes are built to meet.
Calling Cambodia means dialing 011, then +855, instead of the domestic US format — plus accounting for the UTC+7 time difference. Domestic US calls skip both the exit code and the international country code entirely.
3 major networks serve Cambodia: Cellcard, Smart Axiata, Metfone. Twiching interconnects directly with these carriers over Tier-1 routes rather than relying on third-party transit.
Yes, where locally supported — a single Twiching Cambodia number can handle both voice calls and SMS. That avoids the overhead of provisioning and managing two separate numbers for one customer-facing line.
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