+66 · UTC+7

Best Time to Call
Thailand
from the United States

Thailand's +66 code serves one of Southeast Asia's largest mobile markets, led by AIS, True, and dtac. From the US East Coast, business hours in Thailand fall between 9:00 PM and 5:00 AM EST.

Best EST: 9:00 PM – 5:00 AM (+1 day)
Mon–Fri
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// Best Time to Call

When to Call Thailand

A 9-to-5 day in Bangkok never overlaps one in New York — at 9:00 AM ET it is 9:00 PM there — so reach them 9:00 PM–5:00 AM ET or leave a message.

Ideal

Morning

local

EST (UTC−5)
PST (UTC−8)
Ideal

Afternoon

local

EST (UTC−5)
PST (UTC−8)
Avoid

Avoid

local

EST (UTC−5)
PST (UTC−8)
Thailand Business Hours → US Time Zones
Local TimeUTCEST / New YorkCST / ChicagoPST / LA

US columns use standard time (EST/CST/PST); between the second Sunday in March and the first Sunday in November, US clocks are one hour later.

// Calling Guide

How to call Thailand — the short version.

Dialing steps

  1. 1Dial your exit code — 011 from the US and Canada, 00 from most of Europe.
  2. 2Add the Thailand country code: +66.
  3. 3Enter the national number. If it's written with a domestic trunk prefix (often a leading 0), that prefix is usually dropped after the country code.

Best time to call

  • 9:00 AM – 5:00 PM in Bangkok is 9:00 PM – 5:00 AM EST.
  • A 9-to-5 day in Bangkok never overlaps one in New York — at 9:00 AM ET it is 9:00 PM there — so reach them 9:00 PM–5:00 AM ET or leave a message.

Quick tips

  • Working days: Mon–Fri.
// Calling Etiquette

Calling etiquette in Thailand

Calling culture

Thai business culture values politeness, patience, and maintaining harmony — direct confrontation or urgency is generally avoided in favor of a measured tone.

Working week

Mon–Fri.

Frequently Asked

Calling Thailand — Common Questions

Everything you need to know about reaching contacts in Thailand.

Calls outside local business hours in Thailand are less likely to be answered live, but Rozper's AI receptionist and voicemail-to-text still capture the call and notify your team immediately — so you're not limited to the 9:00 PM–5:00 AM EST overlap.

Thai consumers respond well to a recognizable local number, especially given the market's general preference for measured, trust-based communication.

Ready to call Thailand?

Get a local Thailand number or make international calls to +66 numbers — active in under ten minutes.

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