Calling Cambodia Long Distance
The Kingdom of Cambodia operates in Cambodia Standard Time, 7 hours ahead of Greenwich Mean Time and 12 hours ahead of Eastern Standard Time (EST). Unlike the U.S. and much of Europe, Cambodia does not participate in Daylight Saving Time. So for part of the year, it is only 11 hours ahead of EST.
When calling Cambodia long distance, dial your international access code (011 in the U.S.) followed by the country’s calling code: 855. Next dial the area/city code, which in Cambodia has only 2 digits and is always followed by 6-digit subscriber numbers. Check out a list of major city codes here