Voice
How to Call Thailand
This guide provides helpful tips for calling Thailand from the U.S. Learn how to make calls to Thailand with confidence.
The Thailand country code is +66. Use +66 as the international dialing prefix for calls to Thailand from any country, then dial the thai area code without the leading 0 and the local number. The ISO codes are TH and THA.
THAILAND COUNTRY CODE
+66
Dial before any thai number from outside Thailand
What is the country code for Thailand?
| Quick reference | Detail | When to use |
|---|---|---|
| Country Code | +66 | Dial before a thai number |
| ISO Code | TH / THA | Country identifiers |
| International Prefix | +66 | Use for calls into Thailand |
| Trunk Prefix | 0 | Use only for domestic dialing |
| Number Length | 8-9 digits after +66 | Area or mobile code plus subscriber number |
| Emergency | 191 | Police, fire, and ambulance |
Good to know: Thailand uses 1-2 digit area codes. Mobile numbers start with 6, 8, or 9.
For thai numbers, the 0 at the start of a domestic area code is the trunk prefix. Keep it for calls inside Thailand. Remove it when calling from another country.
How to call Thailand
Use this universal format: exit code, then +66, then area code with the trunk 0 removed, then local number.
- Dial your exit code, or press + on a mobile phone.
- Dial 66 for Thailand.
- Dial the area code without the leading 0.
- Dial the local subscriber number.
International call flow:
1. Exit code
→
2. +66
→
3. Area code without 0
→
4. Local number
Exit code by country
US and Canada
011
UK and most of Europe
00
Australia
0011
Mobile, any country
+
Thai numbers use a 0 trunk prefix for domestic calls. Remove it when calling from abroad.
Dialing format and examples
The +CC format works on any mobile phone. Use +66 2 123 4567 for a Bangkok landline and +66 81 234 5678 for a mobile number.
| Origin | Format | Example |
|---|---|---|
| US/Canada | 011 66 area code local number | 011 66 2 123 4567 |
| UK | 00 66 area code local number | 00 66 2 123 4567 |
| Australia | 0011 66 area code local number | 0011 66 2 123 4567 |
| Mobile, any country | +66 area code local number | +66 2 123 4567 |
For other dialing guides, see How to call the Netherlands or How to call Germany.
What a Thailand number looks like
A thai phone number in international format has two parts. The country code +66 and the national number.
Landline
+66 | 2 | 1234567
Mobile
+66 | 81 | 2345678
Number format and length
After +66, thai numbers contain 8-9 digits after +66. Landlines and mobile numbers follow the national format.
| Number type | Pattern | Example |
|---|---|---|
| Bangkok landline | +66 2 XXX XXXX | +66 2 123 4567 |
| Chiang Mai landline | +66 2 XXX XXXX | +66 2 123 4567 |
| Thai mobile | +66 8X XXX XXXX | +66 81 234 5678 |
Format a Thailand number for WhatsApp
For WhatsApp, save the Thai number in international format with +66 and no trunk 0. A Thai mobile written as 081 234 5678 becomes +66 81 234 5678. You can also save it without spaces as +66812345678.
If your team needs a thai number for customer calls or local presence, see Telnyx Phone Numbers for numbers in 140+ countries with instant activation.
Good to know: WhatsApp needs the full international format. Drop the leading 0 before you add +66.
Thailand number formats and emergency numbers
Thai numbers follow the national format. From another country, place +66 before the national number.
| City or region | Domestic code | International code |
|---|---|---|
| Bangkok | 02 | +66 2 |
| Chiang Mai | 053 | +66 53 |
| Phuket | 076 | +66 76 |
| Pattaya | 038 | +66 38 |
| Khon Kaen | 043 | +66 43 |
| Hat Yai | 074 | +66 74 |
| Number type | Dialed in Thailand | Notes |
|---|---|---|
| Emergency | 191 | Police, fire, ambulance |
| Toll-free | 0800 | Free from thai lines, not always reachable from abroad |
| Premium rate | 0900 | Can cost more than standard calls |
| Business numbers | 085 | Non-geographic business lines |
Keep in mind: 191 works inside Thailand only. If you are outside Thailand, call the emergency number for your current location. Some service numbers may not accept calls from outside Thailand.
Cost and best time to call Thailand
Call cost and timing depend on your carrier, your country, and whether you call a landline, mobile, toll-free, or premium-rate number.
How much does it cost to call Thailand
For business calling, Telnyx SIP Trunking gives per-minute pricing for calls to thai landline and mobile destinations with usage-based pricing and no monthly minimums. Your total cost can change based on call volume, destination type, and fees from your current provider.
| Calling method | Cost pattern | Best for |
|---|---|---|
| Mobile carrier | Plan rate or international fee | Personal calls |
| International add-on | Recurring fee plus lower per-minute rates | Repeat callers |
| VoIP or SIP | Per-minute pricing by destination type | Teams and high-volume calling |
Good to know: Ask your provider whether thai mobile calls are priced differently from landline calls. They often are.
Time zones and best time to call
Thailand follows Indochina Time, UTC+7, year-round with no daylight saving. For business calls, aim for 9:00 a.m. to 5:00 p.m. Thai time.
| Calling from | Offset from NL | Best call window |
|---|---|---|
| United Kingdom | TH offset varies | 8:00 a.m. to 4:00 p.m. UK time |
| US Eastern | TH offset varies | 9:00 a.m. to 11:00 a.m. ET |
| US Pacific | TH offset varies | 6:00 a.m. to 8:00 a.m. PT |
Good to know: Time differences can shift for short periods because daylight saving dates do not match in every country.
Is calling Thailand free
Calling Thailand is not automatically free. It may be free if your mobile or landline plan includes Thailand calling, if both parties use an app over data, or if a company gives you a reachable local number.
WhatsApp and similar apps do not charge per minute for app-to-app calls, but your internet or roaming plan may charge for data. Business callers can use SIP Trunking with usage-based pricing for the lowest per-minute rates.
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Serhii Omelchenko
Global AEO/SEO Manager
Serhii is Global AEO/SEO Manager at Telnyx, based in Amsterdam, he is focused on making communications infrastructure findable and credible across both traditional search and AI-driven discovery. He previously led SEO and GEO strategy for some of the world’s most recognized consu
