Voice
How to Call Cambodia
This guide provides helpful tips for calling Cambodia from the U.S. Learn how to make calls to Cambodia with confidence.
The Cambodia country code is +855. Use +855 as the international dialing prefix for calls to Cambodia from any country, then dial the cambodian area code without the leading 0 and the local number. The ISO codes are KH and KHM.
CAMBODIA COUNTRY CODE
+855
Dial before any cambodian number from outside Cambodia
What is the country code for Cambodia?
| Quick reference | Detail | When to use |
|---|---|---|
| Country Code | +855 | Dial before a cambodian number |
| ISO Code | KH / KHM | Country identifiers |
| International Prefix | +855 | Use for calls into Cambodia |
| Trunk Prefix | 0 | Use only for domestic dialing |
| Number Length | 8-9 digits after +855 | Area or mobile code plus subscriber number |
| Emergency | 117 | Police, fire, and ambulance |
Good to know: Cambodia uses 2-3 digit area codes. Mobile numbers start with 1, 7, 8, or 9.
For cambodian numbers, the 0 at the start of a domestic area code is the trunk prefix. Keep it for calls inside Cambodia. Remove it when calling from another country.
How to call Cambodia
Use this universal format: exit code, then +855, then area code with the trunk 0 removed, then local number.
- Dial your exit code, or press + on a mobile phone.
- Dial 855 for Cambodia.
- Dial the area code without the leading 0.
- Dial the local subscriber number.
International call flow:
1. Exit code
→
2. +855
→
3. Area code without 0
→
4. Local number
Exit code by country
US and Canada
011
UK and most of Europe
00
Australia
0011
Mobile, any country
+
Cambodian numbers use a 0 trunk prefix for domestic calls. Remove it when calling from abroad.
Dialing format and examples
The +CC format works on any mobile phone. Use +855 23 123 4567 for a Phnom Penh landline and +855 12 345 6789 for a mobile number.
| Origin | Format | Example |
|---|---|---|
| US/Canada | 011 855 area code local number | 011 855 23 123 4567 |
| UK | 00 855 area code local number | 00 855 23 123 4567 |
| Australia | 0011 855 area code local number | 0011 855 23 123 4567 |
| Mobile, any country | +855 area code local number | +855 23 123 4567 |
For other dialing guides, see How to call the Netherlands or How to call Germany.
What a Cambodia number looks like
A cambodian phone number in international format has two parts. The country code +855 and the national number.
Landline
+855 | 23 | 1234567
Mobile
+855 | 12 | 3456789
Number format and length
After +855, cambodian numbers contain 8-9 digits after +855. Landlines and mobile numbers follow the national format.
| Number type | Pattern | Example |
|---|---|---|
| Phnom Penh landline | +855 XX XXX XXXX | +855 23 123 4567 |
| Siem Reap landline | +855 XX XXX XXXX | +855 23 123 4567 |
| Cambodian mobile | +855 XX XXX XXXX | +855 12 345 6789 |
Format a Cambodia number for WhatsApp
For WhatsApp, save the cambodian number in international format with +855. A cambodian mobile number becomes +855 followed by the national number. You can also save it without spaces.
If your team needs a cambodian number for customer calls or local presence, see Telnyx Phone Numbers for numbers in 140+ countries with instant activation.
Good to know: WhatsApp needs the full international format. Cambodian numbers have no trunk prefix to drop.
Cambodia number formats and emergency numbers
Cambodian numbers follow the national format. From another country, place +855 before the national number.
| City or region | Domestic code | International code |
|---|---|---|
| Phnom Penh | 023 | +855 23 |
| Siem Reap | 063 | +855 63 |
| Battambang | 053 | +855 53 |
| Sihanoukville | 034 | +855 34 |
| Kampong Cham | 042 | +855 42 |
| Kandal | 024 | +855 24 |
| Number type | Dialed in Cambodia | Notes |
|---|---|---|
| Emergency | 117 | Police, fire, ambulance |
| Toll-free | 0800 | Free from cambodian lines, not always reachable from abroad |
| Premium rate | 0900 | Can cost more than standard calls |
| Business numbers | 085 | Non-geographic business lines |
Keep in mind: 117 works inside Cambodia only. If you are outside Cambodia, call the emergency number for your current location. Some service numbers may not accept calls from outside Cambodia.
Cost and best time to call Cambodia
Call cost and timing depend on your carrier, your country, and whether you call a landline, mobile, toll-free, or premium-rate number.
How much does it cost to call Cambodia
For business calling, Telnyx SIP Trunking gives per-minute pricing for calls to cambodian landline and mobile destinations with usage-based pricing and no monthly minimums. Your total cost can change based on call volume, destination type, and fees from your current provider.
| Calling method | Cost pattern | Best for |
|---|---|---|
| Mobile carrier | Plan rate or international fee | Personal calls |
| International add-on | Recurring fee plus lower per-minute rates | Repeat callers |
| VoIP or SIP | Per-minute pricing by destination type | Teams and high-volume calling |
Good to know: Ask your provider whether cambodian mobile calls are priced differently from landline calls. They often are.
Time zones and best time to call
Cambodia follows Indochina Time, UTC+7, year-round with no daylight saving. For business calls, aim for 9:00 a.m. to 5:00 p.m. Cambodian time.
| Calling from | Offset from NL | Best call window |
|---|---|---|
| United Kingdom | KH offset varies | 8:00 a.m. to 4:00 p.m. UK time |
| US Eastern | KH offset varies | 9:00 a.m. to 11:00 a.m. ET |
| US Pacific | KH offset varies | 6:00 a.m. to 8:00 a.m. PT |
Good to know: Time differences can shift for short periods because daylight saving dates do not match in every country.
Is calling Cambodia free
Calling Cambodia is not automatically free. It may be free if your mobile or landline plan includes Cambodia calling, if both parties use an app over data, or if a company gives you a reachable local number.
WhatsApp and similar apps do not charge per minute for app-to-app calls, but your internet or roaming plan may charge for data. Business callers can use SIP Trunking with usage-based pricing for the lowest per-minute rates.
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