Thailand Phone Number Format & Country Code +66
Thai mobile numbers are 10 digits locally starting with 0. The trunk prefix 0 is dropped for international dialing, leaving 9 digits after the country code. Mobile prefixes 06x, 08x, and 09x indicate the carrier. To dial a Thailand number internationally, replace the local trunk prefix with +66. For example, 081 234 5678 becomes +66 81 234 5678. NumSwift converts between these formats automatically, validating each number against Thailand's numbering plan.
Last updated: 2026-03-18
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How to Format Thailand Phone Numbers Correctly
- Identify whether the number is in local format (e.g., 081 234 5678) or already includes the +66 country code
- Paste the number into NumSwift and select Thailand as the country
- NumSwift converts it to the standard international format: +66 81 234 5678
- Use the formatted number for international calls, WhatsApp, SMS, or CRM import
Why Understanding Thailand's Number Format Matters
- Avoid failed calls by using the correct +66 prefix instead of local-only formats
- Thailand's 9-digit structure means numbers that are too short or too long are invalid — NumSwift catches these errors
- Convert freely between local (081 234 5678) and international (+66 81 234 5678) notation
- Works with all Thailand carriers including AIS, DTAC, TrueMove H
Frequently Asked Questions
▶What is the country code for Thailand?
Thailand's country code is +66. When dialing a Thailand number from abroad, you replace the local trunk prefix with +66. For example, the local number 081 234 5678 becomes +66 81 234 5678 in international format.
▶How many digits are in a Thailand phone number?
Thailand phone numbers are 9 digits after the country code. Thai mobile numbers are 10 digits locally starting with 0. The trunk prefix 0 is dropped for international dialing, leaving 9 digits after the country code. Mobile prefixes 06x, 08x, and 09x indicate the carrier. NumSwift validates the digit count automatically, so incorrectly truncated or padded numbers are flagged as invalid.
▶What is the difference between mobile and landline formats in Thailand?
In Thailand, mobile numbers start with 06, 08, or 09 locally. Landline numbers use different prefixes and may have a different digit distribution between the area code and subscriber number. NumSwift distinguishes between the two types and formats each one correctly.
▶How do I dial a Thailand number from another country?
Replace the local trunk prefix with +66 and dial the remaining digits. For example, 081 234 5678 becomes +66 81 234 5678. NumSwift performs this conversion automatically when you paste a Thailand number and select the correct country. The formatted output is ready for calling, WhatsApp, or saving to your contacts.