Thailand Country Code (+66): Bangkok Codes & Calling Guide
Thailand country code +66 guide. Dialing format 00666, Thai mobile prefixes (080, 089, 09X), Chiang Mai 053, Bangkok, and calling tips.
00666 Format, Mobile Prefixes & Chiang Mai Guide
Thailand uses the country code +66 for all international calls. Known as the Land of Smiles, Thailand is a major tourist destination with over 40 million visitors annually and a significant expat community requiring reliable international communication.
Understanding 00666: What Country Code Is This?
If you've seen the number 00666 and wondered what country it belongs to, the answer is Thailand. Here's how it breaks down:
- 00 — International exit code used in most countries outside North America (equivalent to dialing 011 in the USA)
- 66 — Thailand's country code
- 6... — The first digit of the recipient's phone number (e.g., a mobile starting with 06X)
So 00666 is simply the beginning of an international call to a Thai mobile number using the 00 exit code. From the USA, you would dial +66 or 011-66 instead of 00-66.
How to Call Thailand from the United States
To call Thailand from the USA, follow this format:
- Landline: 011 + 66 + area code (without 0) + local number
- Mobile: 011 + 66 + mobile number (without leading 0)
Example: For Bangkok landline 02-XXX-XXXX, dial 011-66-2-XXX-XXXX
Mobile Example: For Thai mobile 08X-XXX-XXXX, dial 011-66-8X-XXX-XXXX
Thai Mobile Number Prefix Guide (080, 089, 09X)
Thai mobile numbers follow the format 0XX-XXX-XXXX (10 digits). The first three digits identify the carrier:
| Prefix | Carrier |
|---|---|
| 080 | TrueMove H |
| 081 | AIS |
| 082 | DTAC |
| 083 | AIS |
| 084 | TrueMove H |
| 085 | DTAC |
| 086 | DTAC / AIS |
| 087 | DTAC / AIS |
| 088 | AIS / TrueMove H |
| 089 | DTAC / AIS |
| 090 | AIS |
| 091 | TrueMove H |
| 092 | AIS |
| 093 | AIS |
| 094 | TrueMove H |
| 095 | TrueMove H / AIS |
| 096 | DTAC / TrueMove H |
| 097 | TrueMove H / AIS |
| 098 | AIS / DTAC |
| 099 | TrueMove H / AIS |
| 06X | AIS / TrueMove H / DTAC |
Important: Prefixes 089 and 080 are mobile phone prefixes, not geographic area codes. When dialing internationally, drop the leading 0: +66-89-XXX-XXXX.
Chiang Mai Area Code: +66 53
Chiang Mai, Thailand's northern cultural capital, uses area code 053 (or 53 when dialing internationally). It's the second-largest city and a popular destination for digital nomads and retirees.
- From USA: 011-66-53-XXX-XXXX
- International format: +66-53-XXX-XXXX
- Locally in Thailand: 053-XXX-XXXX
Note: Chiang Rai also shares the 053 area code prefix.
Major City Area Codes
- Bangkok (Central Thailand): 02
- Chiang Mai (Northern Thailand): 053
- Phuket (Southern Thailand): 076
- Pattaya (Eastern Seaboard): 038
- Koh Samui: 077
- Hua Hin: 032
- Krabi: 075
- Chiang Rai: 053
Thailand Mobile Carriers
Thailand has three major mobile operators serving over 90 million subscriptions:
- AIS (Advanced Info Service): Market leader with 45%+ share, best coverage
- True Move H: Second largest, strong 5G network in urban areas
- DTAC: Third major carrier, good value prepaid options
LINE Dominance in Thailand
Unlike most countries where WhatsApp dominates, Thailand uses LINE as its primary messaging app with 50+ million users and 90%+ smartphone penetration. Download LINE before visiting Thailand!
Time Zone
Thailand uses ICT (Indochina Time, UTC+7) year-round:
- 12 PM EST = 12 AM Thailand (next day)
- 9 AM PST = 12 AM Thailand (next day)
- 12 PM GMT = 7 PM Thailand
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