When to ring Thailand (+66)
Thailand runs on ICT — seven hours ahead of GMT, the same zone as Vietnam and Cambodia. Knowing the best time to call Thailand on +66 keeps you inside Bangkok office hours.
ICT, at a glance.
See the live gap between a global reference city and Thailand's single ICT zone — no calculator needed.
Thailand against the world's hubs.
Compare live Thai time against New York, London and Dubai so your call lands inside Bangkok office hours.
Understanding the time difference between the United States and Thailand
Time zone differences across other major countries
Why timing matters for calls to Thailand.
Bangkok mornings start early — catch the first window and you reach Thai decision-makers before the afternoon heat slows things down.
The best windows to reach Thailand.
Four factors that decide when a Thai prospect picks up — anchored to the single ICT business day.
Thailand runs at +07:00
The zone is Asia/Bangkok. 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 Thailand.
No daylight saving
Thailand stays on +07:00 all year. The windows below only move when the caller's own country changes its clocks, not when Thailand does.
Shared hours with 3 of 5 markets
Callers in London, Mumbai, Sydney share part of the working day with Thailand. 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 Thailand from those cities means someone is working outside normal hours — worth saying so when you book the call.
How to call Thailand using the +66 code.
Four simple steps for every call into Thailand — including the leading-zero rule.
Number anatomy
Dial exit code
Press + on mobile or 00 from most landlines. This opens an international line.
Enter +66
Thailand's international code. Every call to Thailand must start with +66.
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 Thai customers in their window, on carrier-grade routes.
Free trial · No card required · Port numbers free · Month-to-month
When your working day overlaps Thailand
Callers in London, Mumbai and Sydney share part of the working day with Thailand. There is no shared working window with New York and Los Angeles.
| Calling from | Thailand 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 Thailand'sstandard-time offset of +07:00. Thailand 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 Thailand, answered.
Time zone, daylight saving and dialling questions for Thailand (+66).