How to Use the +855 Country Code: A Guide for SMBs and Startups

Whether you're managing a supply chain partner in Phnom Penh or supporting a client in Siem Reap, dialing Cambodian phone numbers correctly using the 855 country code is essential for smooth international communication.

This guide will help you understand Cambodia’s phone number format, common pitfalls, and how cloud phone systems like DialLink can support global communication for small businesses and startups.

What Is the 855 Country Code?

+855 is the international dialing code for Cambodia. It's used when calling Cambodian phone numbers from outside the country.

Here’s the breakdown:

• Country Code: +855
• Phone Number Format: +855 XX XXX XXX or +855 XX XXX XXXX (depending on number type)

Cambodian phone numbers are generally 8 to 9 digits long (excluding the country code). The length varies based on whether it’s a landline or mobile phone number.

Common Pitfalls in International Number Formatting

Formatting errors can prevent your message or call from reaching its destination. Here are the most common mistakes when working with Cambodian phone numbers:

• Leaving out the country code – Always include +855 when calling from outside Cambodia.
• Using a trunk prefix (0) – Cambodian numbers often start with a 0 locally, but this must be removed when dialing internationally.
• Inconsistent formatting in CRMs or VoIP tools – Irregular entry formats can lead to failed lookups or messages.
• Unclear differentiation between landlines and mobile numbers – Mobile numbers in Cambodia typically start with 1, 6, 7, 8, or 9, while landlines start with 2 or 3.

To avoid connection issues, always store phone numbers in a standardized E.164 international format.

Make International Calling Easy with DialLink

DialLink is the AI-powered cloud phone system built for SMBs and startups who need reliable international communication without the enterprise overhead.

Here’s how we simplify calling Cambodia:

• International calls – Make affordable international calls with no complex setup or hidden fees
• AI voice agents – Automate routine calls, like client support or booking inquiries
• Mobile, desktop, and desk phone support – Make calls anytime, from anywhere
• Professional call handling tools – Voicemail, call routing, transcripts, and more
• Business messaging – Send and receive messages from Cambodia-based contacts

From international vendor management to supporting clients in Southeast Asia, DialLink empowers your team to stay professional and productive.

Common Cambodia Number Format Examples

*Note: Cambodian toll-free numbers are only accessible within Cambodia.

How to Read and Format Cambodia Numbers

Cambodia’s numbering system includes 8- and 9-digit numbers, depending on the service provider and location. Here's a breakdown:

• +855 – The international country code for Cambodia
• XX – The operator or area code (e.g., 23 for landlines, 97 for mobile)
• XXX XXX / XXXX XXX – The local subscriber number

For mobile numbers, leading digits such as 10, 12, 17, 88, 89, 90–99 are common.

Format Variations

• International Format (E.164): +855971234567 — Ideal for CRM tools and VoIP platforms
• Local Format (in Cambodia): 097 123 4567 — Used when dialing domestically
• International Dialing Format (from the US): 011 855 97 123 4567 — Replace 011 with your country's exit code if different

Best Practices for SMBs

• Always store Cambodian phone numbers in +855 format to ensure compatibility with communication platforms
• Remove the leading 0 when adding numbers to your international contact list
• Ensure your CRM and VoIP systems support E.164 formatting to improve deliverability and integration

By following these practices, your team can increase connection rates, reduce misdials, and maintain a professional image globally.