What is the country code for the United States?

The United States country code is +1. When calling from Cambodia, dial your exit code (001, 007, or 008) followed by 1, then the full 10-digit US phone number. On a mobile phone, simply dial +1 followed by the number.

What exit code do I use to call internationally from Cambodia?

Cambodia uses carrier-specific exit codes: 001 for Telecom Cambodia, 007 for Royal Telecom, and 008 for VoIP services. If you're on a mobile phone, you can use the + symbol instead, which works regardless of your carrier.

How much does it cost to call the US from Cambodia with Sayfone?

Sayfone offers calls from Cambodia to the United States at $0.08 per minute. You can start calling directly from your browser — no app download or special SIM card required.

What time should I call the US from Cambodia?

Cambodia is 11 to 14 hours ahead of the continental US depending on time zone. For personal calls, try 7 PM – 11 PM Cambodia time to reach people during their morning hours. For business calls, 9 PM – 5 AM Cambodia time aligns with standard US East Coast business hours.

Can I call US toll-free numbers (1-800, 1-855) from Cambodia?

Generally, no. US toll-free numbers are designed for domestic callers and most cannot be reached from international numbers. Look for an alternative direct-dial number on the company's website, or try calling through a US-based VoIP service.

Do I dial US mobile and landline numbers differently from Cambodia?

No. Both US landlines and mobile phones use the same 10-digit format: a 3-digit area code followed by a 7-digit local number. The dialing process is identical regardless of whether you're calling a mobile or landline.

Why does my call to the US from Cambodia keep failing?

The most common reasons are: using the wrong exit code for your Cambodian carrier, omitting the US country code (1), dialing an incorrect or outdated area code, or attempting to reach a US toll-free number. Double-check your full dialing sequence and try using + on your mobile phone instead of a carrier exit code.

Do I need to install an app to use Sayfone?

No. Sayfone works directly in your web browser. Just open Sayfone, enter the US number you want to call, and connect. No downloads, no installation, no special setup.

Quick Answer

How to Call the United States from Cambodia

To call the US from Cambodia, dial your exit code (001, 007, or 008 depending on your carrier), then 1 (the US country code), then the 3-digit area code and 7-digit local number. From a mobile phone, dial +1 followed by the full 10-digit US number. Sayfone offers calls to the United States for just $0.08 per minute — open your browser and start calling.

Call the United States Now

Cost tools

🇰🇭From Cambodia

To United States🇺🇸

$0.08

Per minute

Country code

Call quality

Landline rate

$0.08/min

Mobile rate

$0.08/min

Same per-minute Sayfone rate for landline and mobile.

Average call quality

Whether you're calling family in Lowell, Long Beach, or Seattle — or coordinating a business shipment — here's exactly how to connect from Cambodia to any US number.

Steps at a glance

Dial your Cambodian carrier exit code: 001, 007, or 008 (or use + on mobile)
Enter the US country code: 1
Dial the 3-digit US area code (e.g. 213 for Los Angeles, 617 for Boston)
Dial the 7-digit local number
Full example: 001 + 1 + 213 + 555 1234

Sources

1
Cambodia international exit codes (carrier-specific)
Source for Cambodia exit codes 001/007/008
2
ITU E.164 – Telephone numbers in Cambodia
Source for Cambodia numbering plan and exit codes
3
US country code +1 and dialing format
Source for US country code and number structure

STEP-BY-STEP GUIDE

How to Dial the United States from Cambodia

Follow these steps to reach any US landline or mobile number from a Cambodian phone or internet connection.

1
Dial Cambodia's exit code
From a landline or depending on your mobile carrier, dial 001 (Telecom Cambodia), 007 (Royal Telecom), or 008 (VoIP). On most mobile phones, you can simply press and hold 0 to get the + symbol, which replaces any exit code.
```
001 or 007 or 008 or +
```
2
Enter the US country code
The United States country code is 1. Dial it immediately after the exit code or + symbol.
```
001 + 1 … or +1 …
```
3
Dial the 3-digit area code
Every US phone number starts with a 3-digit area code that identifies the region. For example, 213 is Los Angeles, 617 is Boston, and 206 is Seattle. Cambodian-American community hubs include Long Beach, CA (area code 562), Lowell, MA (area code 978), and Seattle, WA (area code 206).
```
001 + 1 + 562 …
```
4
Dial the 7-digit local number
Complete the call by entering the remaining 7 digits of the US phone number. Both US landlines and mobile phones follow the same 10-digit format (area code + local number).
```
001 + 1 + 562 + 555 1234
```
5
Full dialing example
To call a number in Long Beach, California from a Telecom Cambodia line, you would dial: 001 1 562 555 1234. From a mobile phone: +1 562 555 1234.
```
+1 562 555 1234
```

Dialing format reference

Use these patterns when entering a full international number to +1.

Mobile

+1 (XXX) XXX-XXXX

Landline

+1 (XXX) XXX-XXXX

+1 562 555 1234 (Long Beach, CA)
+1 978 555 6789 (Lowell, MA)
+1 206 555 4321 (Seattle, WA)
+1 212 555 0198 (New York, NY)

Major city area codes

Long Beach, CA562

Lowell, MA978

Seattle, WA206

Los Angeles, CA213

New York, NY212

Boston, MA617

San Francisco, CA415

Sources

1
Cambodia carrier exit codes
Source for multiple Cambodia exit codes by carrier
2
US phone number structure
Source for US area codes and 10-digit format

DIALING RULES

Important Dialing Rules for Calling the US from Cambodia

Keep these rules in mind to make sure your call connects on the first try.

Cambodia has multiple exit codes — pick the right one

Unlike most countries that use a single exit code, Cambodia's international dialing prefix depends on your carrier: 001 for Telecom Cambodia, 007 for Royal Telecom, and 008 for VoIP. If unsure, use the + symbol on your mobile phone, which works with any carrier.

US landlines and mobiles use the same format

In the United States, both landline and mobile numbers follow the same 10-digit format: a 3-digit area code plus a 7-digit local number. There is no need to distinguish between the two when dialing from abroad.

Do not add a leading 0 or 1 before the area code

When calling from Cambodia, do not prepend a 0 or an extra 1 to the US area code. The US country code is simply 1, followed immediately by the 3-digit area code. Adding extra digits will cause the call to fail.

Watch out for US toll-free numbers

US toll-free numbers (starting with 800, 888, 877, 866, 855, 844, or 833) generally cannot be reached from international numbers. If you need to contact a US business that only lists a toll-free number, look for an alternative direct-dial number on their website.

855 is both Cambodia's country code and a US toll-free prefix

The number 855 serves double duty: it's Cambodia's international country code and also a US toll-free prefix (1-855). Context determines meaning. When dialing out of Cambodia, your exit code + 1 routes the call to the US, so there's no conflict — just be aware of the coincidence when reading phone numbers.

TIMING & TIPS

Best Times to Call the US from Cambodia

Cambodia (ICT, UTC+7) is 11 to 14 hours ahead of the continental United States depending on time zone. Planning your call around this gap ensures you reach people at a reasonable hour.

🇺🇸

The large time difference between Cambodia and the US means daytime overlap is limited. Evening and late-night hours in Cambodia align with morning and daytime in the US.

Time & windows

US East Coast (New York, Boston)

Cambodia is 11 hours ahead (EDT) / 12 hours ahead (EST)

When it's 8 PM in Phnom Penh, it's 9 AM in New York (EDT)

US West Coast (Los Angeles, Seattle)

Cambodia is 14 hours ahead (PDT) / 15 hours ahead (PST)

When it's 10 PM in Phnom Penh, it's 8 AM in Los Angeles (PDT)

US Central (Chicago, Houston)

Cambodia is 12 hours ahead (CDT) / 13 hours ahead (CST)

When it's 9 PM in Phnom Penh, it's 9 AM in Chicago (CDT)

🇰🇭Best for personal calls to US East Coast

7:00 PM – 10:00 PM Cambodia timeCatches 8 AM – 11 AM in New York (EDT)

🇰🇭Best for personal calls to US West Coast

9:00 PM – 12:00 AM Cambodia timeCatches 7 AM – 10 AM in Los Angeles (PDT)

🇰🇭Best for US business hours (East Coast)

9:00 PM – 5:00 AM Cambodia timeAligns with 9 AM – 5 PM Eastern (EDT)

🇰🇭Weekend family calls

8:00 PM – 11:00 PM Cambodia time (Saturday)Saturday morning in the US — most family members are available

Calling tips

Use the + dialing prefix on your mobile to bypass carrier-specific exit codes — it works with any Cambodian operator.
Sayfone works in your browser at $0.08/min to the US, so you don't need a special SIM or app installation.
If you frequently call the same US numbers, save them in your contacts with the full international format (+1 XXX XXX XXXX) to avoid dialing errors.
Cambodia does not observe daylight saving time, but the US does — check whether US clocks have shifted before scheduling calls in March and November.
Consider texting or messaging first to confirm the recipient is available, especially given the large time difference.

Business etiquette

For business calls to the US, aim for 9 AM – 12 PM recipient time — early mornings are when most professionals are most responsive.
If coordinating garment or textile supply-chain calls, account for the fact that US buyers often operate on East Coast time even when based in other regions.
US business culture favors punctuality — if you schedule a call, dial at the agreed time to the minute.
Start with a brief greeting and state the purpose of your call clearly. US business communication tends to be direct and time-efficient.

Sources

1
Time difference: Cambodia to US
Source for time zone offset data

TROUBLESHOOTING

Common Issues When Calling the US from Cambodia

If your call isn't connecting, check these common problems before trying again.

Call won't connect at all

Double-check your exit code. Cambodia has multiple exit codes (001, 007, 008) depending on your carrier. Using the wrong one may cause the call to fail. On mobile, try using + instead.

You hear a recording saying the number is not in service

Verify you have the correct 3-digit area code. US cities often have multiple area codes, and some change over time. Also ensure you are not accidentally dialing a toll-free prefix (800, 855, etc.) as if it were a regular area code.

Call connects but audio quality is poor

International calls routed over traditional phone lines can suffer from latency on the Cambodia–US corridor due to the long distance. Try calling via Sayfone in your browser over a stable Wi-Fi or 4G connection for clearer audio quality.

You're being charged unexpectedly high rates

Cambodian carriers may charge premium rates for international calls to the US. Check your carrier's international rate card, or switch to Sayfone at $0.08 per minute for predictable, transparent pricing.

US toll-free numbers (800, 855, etc.) don't work

Most US toll-free numbers cannot be reached from international lines. Look for a direct-dial number on the company's website, often listed as an 'international callers' or 'calling from outside the US' option.

Sources

1
Troubleshooting international calls – Xe
General troubleshooting for calls to the US

Savings

See what you could save

Adjust the tools below to compare Sayfone with typical retail pricing for calls to United States. Start with one call, then layer on monthly volume to see the bigger picture.

How to use these tools

Sayfone uses your live rate for calls to United States — the same basis as the rest of this page.
First, estimate savings on a single call length. Then, model a full month of minutes versus typical retail benchmarks.
Retail competitor rows are illustrative — not a quote from any carrier.