Best hours to reach Cambodia (+855)
Cambodia runs on ICT — seven hours ahead of GMT, sharing its time zone with Thailand and Vietnam. Knowing the best time to call Cambodia on +855 keeps you inside Phnom Penh office hours.
ICT, at a glance.
See the live gap between a global reference city and Cambodia's single ICT zone — no calculator needed.
Cambodia against the world's hubs.
Compare live Cambodian time against New York, London and Dubai so your call lands inside Phnom Penh office hours.
Understanding the time difference between the United States and Cambodia
Time zone differences across other major countries
Why timing matters for calls to Cambodia.
Cambodia's ICT zone aligns with Thailand — a morning call in Phnom Penh reaches both markets at once.
The best windows to reach Cambodia.
Four factors that decide when a Cambodian prospect picks up — anchored to the single ICT business day.
Cambodia runs at +07:00
The zone is Asia/Phnom_Penh. Every window on this page is worked out from that offset rather than a rule of thumb, so the times shown are the ones that actually apply to Cambodia.
No daylight saving
Cambodia stays on +07:00 all year. The windows below only move when the caller's own country changes its clocks, not when Cambodia does.
Shared hours with 3 of 5 markets
Callers in London, Mumbai, Sydney share part of the working day with Cambodia. The table above gives the exact intersection for each.
Where the gap is too wide
There is no 9-to-5 overlap with New York, Los Angeles. Calling Cambodia from those cities means someone is working outside normal hours — worth saying so when you book the call.
How to call Cambodia using the +855 code.
Four simple steps for every call into Cambodia — including the leading-zero rule.
Number anatomy
Dial exit code
Press + on mobile or 00 from most landlines. This opens an international line.
Enter +855
Cambodia's international code. Every call to Cambodia must start with +855.
Area prefix
Add the local area or mobile network code — always drop any leading zero used for domestic calls.
Full number
Dial the remaining subscriber digits. Your number is now correctly formatted for international routing.
Best time to call — every country.
Jump to any country's best-time-to-call guide. Search by name, ISO or dial prefix.
Reach Cambodian customers in their window, on carrier-grade routes.
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When your working day overlaps Cambodia
Callers in London, Mumbai and Sydney share part of the working day with Cambodia. There is no shared working window with New York and Los Angeles.
| Calling from | Cambodia is | Call at (your time) | Which is (their time) |
|---|---|---|---|
| New York | 12h ahead | No shared working hours — you would need to call outside 9am-5pm | |
| Los Angeles | 15h ahead | No shared working hours — you would need to call outside 9am-5pm | |
| London | 7h ahead | 9:00 AM – 10:00 AM | 4:00 PM – 5:00 PM |
| Mumbai | 1h 30m ahead | 9:00 AM – 3:30 PM | 10:30 AM – 5:00 PM |
| Sydney | 4h behind | 1:00 PM – 5:00 PM | 9:00 AM – 1:00 PM |
Windows are the intersection of a 9am-5pm working day in each place, using Cambodia'sstandard-time offset of +07:00. Cambodia does not observe daylight saving, so these windows hold all year — though they shift when the caller's own country changes its clocks.
FAQ
Calling Cambodia, answered.
Time zone, daylight saving and dialling questions for Cambodia (+855).