Ideal
Early Window
local
Cambodian mobile numbers drop their leading 0 internationally — dialed simply as +855 followed by the remaining digits.
EST (UTC−5)
PST (UTC−8)
+855 · UTC+7
Best Time to Call
Cambodia
from the United States
Cambodia's +855 code covers a Southeast Asian market served primarily by Smart Axiata, Cellcard, and Metfone. From the US East Coast, business hours in Cambodia fall between 9:00 PM and 5:00 AM EST.
Best EST: 9:00 PM – 5:00 AM (+1 day)
Mon–Fri
United States
09:29 AM
Business hours
11h
difference
Cambodia
08:29 PM
Outside office
// Best Time to Call
When to Call Cambodia
Cambodia business hours overlap with US afternoon/evening. Plan calls for after 3 PM EST to reach their morning.
Ideal
Prime Window
local
Answers about Cambodia's carrier landscape, respect-focused business culture, and getting a local +855 virtual number.
EST (UTC−5)
PST (UTC−8)
Avoid
Avoid
local
Outside business hours in Cambodia. Calls will likely go to voicemail or be unwelcome.
EST (UTC−5)
PST (UTC−8)
| Local Time | UTC | EST / New York | CST / Chicago | PST / LA |
|---|---|---|---|---|
| Open | ||||
| Noon | ||||
| PM | ||||
| Close |
// Calling Guide
How to call Cambodia — the short version.
Dial the right code, pick the right window, and your call to Cambodia goes through first time.
Dialing steps
- 1Dial your exit code — 011 from the US, 00 from most of Europe.
- 2Add the Cambodia country code: +855.
- 3Enter the local number, including any area code.
- 4Press call and confirm the time zone first.
Best time to call
- 9:00 AM – 5:00 PM local time in Phnom Penh — most people are at their desk.
- That's 9:00 PM – 5:00 AM EST if you're calling from the US.
- Cambodia business hours overlap with US afternoon/evening. Plan calls for after 3 PM EST to reach their morning.
- Avoid calling outside local business hours — calls are less likely to be answered.
Quick tips
- Save the +855 code in your contacts so every call dials correctly.
- Cambodia business hours run Mon–Fri.
- Use a Rozper local virtual number to call as if you're already there — no per-minute international rates.
// Calling Etiquette
Cambodia Business Calling Etiquette
Cultural context for calling contacts in Cambodia — know what to expect before you dial.
Network & carriers
Cambodia's telecom market is served by Smart Axiata, Cellcard, and Metfone as the major mobile carriers.
Numbering format
Cambodian mobile numbers drop the leading 0 internationally — dialed simply as +855 followed by the remaining digits.
Calling culture
Cambodian business culture values politeness, patience, and respect for hierarchy — a calm, unhurried tone is generally appreciated.
Good to know
Cambodia's mobile market grew rapidly in the 2010s, with mobile phones becoming the primary way most of the country accesses telecommunications and the internet.
// Why Rozper
Built for Calling Cambodia at Scale
From crystal-clear audio to automatic CRM logging, here's what powers every call your team makes to Cambodia.
Cambodia Coverage, Included
Get a virtual number for Cambodia (+855) alongside 150+ other countries — no office required in Phnom Penh.
HD Calls Across Asia
Crystal-clear audio to Cambodia over our optimised carrier network — no degraded quality on the UTC+7 route.
Every Cambodia Call, Transcribed
Calls are recorded and transcribed automatically — handy when your Cambodia contacts speak Khmer.
Never Miss a Call from Cambodia
Voicemails picked up outside the Mon–Fri work week are transcribed and delivered by email or SMS.
Cambodia Calls, Logged Automatically
Every call to or from your Cambodia number logs straight into Salesforce, HubSpot, or Zoho CRM — deal values in Cambodian Riel.
Analytics for Your Cambodia Line
See call volume and answer rates for Cambodia, broken down by hour against UTC+7.
A Local Phnom Penh Caller ID
Show a recognisable Phnom Penh number when calling Cambodia — dramatically improves pickup rates.
Go Live in Cambodia in 60 Seconds
Activate your Cambodia virtual number instantly — no contracts, no hardware, no delays.
99.99% Uptime, Even to Cambodia
Enterprise-grade reliability for calls to Cambodia and 150+ other countries, with 24/7 expert support.
// Get Started
Start Calling Cambodia Today
Active in under ten minutes. No contracts or hardware needed.
- 01
Sign up for Rozper
Create your account in under 2 minutes. No credit card required to start your free trial.
- 02
Get a Cambodia virtual number
Browse available numbers in your target country. Pick a local or toll-free number that fits your needs.
- 03
Configure call routing
Route incoming calls to any device — mobile, desk phone, or browser. Set business hours and voicemail greetings.
- 04
Start calling internationally
Make and receive calls from your new international number. Active and ready in under 10 minutes.
// Complete List
All world dial codes by country.
Every country and territory, every international dial code. Click a country to browse it.
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Frequently Asked
Calling Cambodia — Common Questions
Everything you need to know about reaching contacts in Cambodia.
The international dialing code for Cambodia is +855. To call Cambodia from the US, dial 011 + 855 + the local phone number (omitting the leading 0 if present).
Ready to call Cambodia?
Get a local Cambodia number or make international calls to +855 numbers — active in under ten minutes.
99.99% Uptime
150+ Countries
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