How to Call Thailand From the US: Complete Guide (+66)
Table of Contents
Thailand is a major calling destination from the US — for expats, travelers, retirees, and business contacts. Thai phone numbers follow a simple format once you know the rules, and VoIP rates are among the cheapest in Southeast Asia.
This guide covers how to dial Thai numbers correctly and the most affordable options for calling Thailand.
How to Dial Thailand From the US
Step by Step
- Dial + (or 011 from a US landline)
- Dial 66 (Thailand country code)
- Drop the leading 0 and dial the rest
Example: A Thai person gives you 081-234-5678. You dial +66 81 234 5678 (remove the 0).
Thailand Area Codes
Bangkok is the only city with a 1-digit area code (2). All other regions have 2-digit codes.
Thai Mobile Numbers
All Thai mobile numbers start with 0 followed by 6, 8, or 9 (domestically). From the US, drop the 0:
Thai mobile numbers are 10 digits domestic (0XX-XXX-XXXX) or 11 digits international (+66 XX XXX XXXX).
Cheapest Ways to Call Thailand From the US
Best Option by Situation
Calling family or friends
LINE app — LINE is the dominant messaging app in Thailand (not WhatsApp). 52M+ users. Free voice and video calls. If your Thai contact has a smartphone, they almost certainly have LINE.
Calling hotels and businesses
BubblyPhone at $0.01/min for Bangkok landlines. Perfect for booking hotels, restaurants, or calling tour operators.
Calling Thai mobile numbers
BubblyPhone or Google Voice at $0.03/min. For frequent callers, Rebtel at $0.02/min with plan.
Tips for Calling Thailand
- Time difference: Thailand is 12 hours ahead of EST (ICT, UTC+7). 8 PM EST = 8 AM Thailand next day.
- LINE, not WhatsApp: Thailand primarily uses LINE for messaging, not WhatsApp. Download LINE if you want to text/call Thai contacts for free.
- Tourist areas: Hotels in Bangkok, Phuket, and Chiang Mai often have English-speaking reception. Call between 8 AM-10 PM local time.
- Songkran (Thai New Year): April 13-15 — businesses closed, phone lines busy.
- SIM cards: If you are traveling to Thailand, a local SIM (AIS, DTAC, or True) costs $5-$10 at any 7-Eleven. Better than international calling for local use.
Summary
Calling Thailand from the US costs just $0.01/min for landlines and $0.03/min for mobiles with BubblyPhone. Use LINE (not WhatsApp) for free calls to Thai contacts with smartphones. Dial +66, drop the leading 0, and you are connected.
