Get Connected Fast
Dial +855 followed by the Cambodian number (without the leading 0 if present) to call Cambodia from Japan. Most calls connect instantly.
$0.18
Per minute
+855
Country code
HD
Call quality
Landline rate
$0.18/min
Mobile rate
$0.18/min
Same per-minute Sayfone rate for landline and mobile.
Average call quality
Steps at a glance
Sources
DIAL STEP BY STEP
Follow these steps to connect your call from Japan to any Cambodian landline or mobile number.
From Japan, begin every international call with 010. This tells your phone network you're making an international call.
010
Next, dial 855, which is Cambodia's international dialing code. This routes your call to the Cambodian network.
010 + 855
Enter the recipient's local number. If it starts with 0 (as most Cambodian numbers do), omit the leading 0 when dialing internationally.
010 + 855 + 1234567 (for a local number starting with 01234567)
Tap or press the call button. Your call will route through the international network to Cambodia.
Dialing format reference
+855
Use these patterns when entering a full international number to +855.
Mobile
+855 [1-9] [number] (typically 8 digits after country code)
Landline
+855 [area code] [number] (typically 8–9 digits after country code)
Major city area codes
Sources
IMPORTANT DIALING RULES
Understanding Cambodia's number structure and international dialing rules ensures your calls connect reliably.
Cambodian landlines and mobiles are written domestically with a leading 0 (e.g., 023456789). When dialing internationally, always omit this 0. Your international dial string is +855 23456789, not +855 023456789.
After the country code +855, Cambodian numbers are typically 8 to 9 digits long. This includes both mobiles and landlines. A complete number looks like +855 XXXXXXXX or +855 XXXXXXXXX.
All international calls from Japan begin with 010. This is Japan's standard international dialing prefix and is required by all carriers.
Cambodia does not require different dialing sequences for mobile vs. landline calls. The same +855 dialing format works for both.
SMART CALLING TIPS
Time zones, business hours, and practical calling etiquette will help your calls connect with people who are available and ready to chat.
Japan (JST)
UTC+9 year-round
No daylight saving time
Cambodia (ICT)
UTC+7 year-round
No daylight saving time
Time Difference
Cambodia is 2 hours behind Japan
Consistent throughout the year
Sources
CALLING TROUBLESHOOTING
If your call to Cambodia doesn't connect or sounds poor, here are the most common causes and how to fix them.
Verify you've dialed the full sequence: 010 + 855 + local number (without leading 0). Check that you have international calling enabled on your plan. Network congestion or poor signal on either end can also cause drops. Try again after a few minutes or at a different time of day.
Audio quality depends on both networks and internet routing. If using VoIP, check your local internet connection. Allow a brief pause when speaking to account for network latency. Mobile calls may experience more latency than landline calls.
International calling rates vary by Japanese carrier. Check with your provider about their standard international rates. If using Sayfone, rates are transparent and shown before each call.
Make sure you're removing the leading 0 from Cambodian numbers. A common mistake: dialing +855 023456789 instead of +855 23456789. The 0 is only used domestically within Cambodia.
Savings
Adjust the tools below to compare Sayfone with typical retail pricing for calls to Cambodia. Start with one call, then layer on monthly volume to see the bigger picture.
How to use these tools
Set duration and country. See Sayfone vs. an illustrative retail rate for the same call.
I'm calling…
Enable enterprise discount
Save additional 40% (enterprise)
Your call
Your call will cost
$2.16
$0.18 per minute
That's 60% less than competitors
Set monthly minutes and call type. Bars compare Sayfone to common retail benchmarks for the same volume.
Drag slider to adjust
220
min / month
~$8.82/min
~$6.66/min
~$3.96/min
~$0.90/min
$0.180/min
Annual saving vs. AT&T
Based on 220 min/month
Before you go
Check rates for Cambodia or browse other how-to guides from Japan.
Route guides from Japan
FREQUENTLY ASKED
Quick answers to the most common questions about dialing Cambodia, rates, and call quality.
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