What is the country code for Thailand?

Thailand's country code is +66. When calling from Japan, dial 010 66 (or +66 if using an international format), followed by the area code (without the leading 0) and the local number.

Do I need a special app or registration to call Thailand from Japan?

No. You can call Thailand from Japan using any phone with international calling enabled, or through a browser-based service like Sayfone. Sayfone requires no app download—just enter the number and dial from your browser.

What is the time difference between Japan and Thailand?

Thailand is 2 hours behind Japan year-round. When it's 12:00 PM (noon) in Japan, it is 10:00 AM in Thailand. Neither country observes daylight saving time, so this difference is constant.

How much does it cost to call Thailand from Japan with Sayfone?

Sayfone charges $0.18 per minute to call Thailand. There are transparent pricing, connection charges, or minimum call lengths. You pay only for the minutes used.

Can I call Thai mobile numbers from Japan?

Yes. Thai mobile numbers start with 8 or 9 (after the country code +66) and are dialed the same way as landlines. Dial +66 8X or +66 9X, followed by the remaining digits. International calling rates apply regardless of mobile or landline.

What should I do if the number doesn't connect?

Verify the number format: +66 [area code without 0] [local number]. Ensure you have removed any leading zeros or spaces. If the issue persists, check your internet connection (for VoIP) or contact your service provider.

Quick Start

Calling Thailand from Japan

To call Thailand from Japan, dial +66 (Thailand's country code) followed by the area code and local number. Calls cost $0.18 per minute on Sayfone.

Start calling

Cost tools

🇯🇵From Japan

To Thailand🇹🇭

$0.18

Per minute

+66

Country code

Call quality

Landline rate

$0.18/min

Mobile rate

$0.18/min

Same per-minute Sayfone rate for landline and mobile.

Average call quality

Steps at a glance

Dial +66 (or 009 + 66 on older landlines)
Enter the area code (omit the leading 0)
Dial the local subscriber number
Review the rate and connect

DIALING STEPS

How to Dial Thailand from Japan

Follow these steps to place a call from Japan to Thailand using Sayfone or any international service.

1
Step 1: Dial the International Access Code
From Japan, dial 010 to access the international long-distance service. Some VoIP services may use 00 or other codes; check your provider.
```
010
```
2
Step 2: Enter Thailand's Country Code
Dial 66, which is Thailand's country code.
```
010 66
```
3
Step 3: Dial the Area Code (Without Leading Zero)
Enter the area code for your destination in Thailand. For Bangkok, this is 2. If the full number includes a leading 0, omit it when dialing internationally.
```
010 66 2 (for Bangkok)
```
4
Step 4: Dial the Local Number
Complete the call by entering the 6–8 digit local subscriber number.
```
010 66 2 1234 5678
```

Dialing format reference

+66

Use these patterns when entering a full international number to +66.

Mobile

+66 8X XXXX XXXX or +66 9X XXXX XXXX (8–10 digits after country code)

Landline

+66 2 XXXX XXXX (Bangkok) or +66 XX XXXX XXXX (other regions, 8–10 digits total)

+66 2 1234 5678 (Bangkok landline)
+66 81 234 5678 (Mobile)

Major city area codes

Bangkok2

Chiang Mai53

Phuket76

Pattaya38

Sources

1
ITU Country Calling Codes
Authority on Thailand country code +66
2
National Telecommunications Commission Thailand
Thai numbering plan and area code format

FORMAT RULES

Thailand Dialing Format & Rules

Important format rules to ensure your calls connect properly.

Drop the Leading Zero from Area Codes

When dialing internationally, always omit the leading 0 from Thai area codes and mobile prefixes. Dial the country code +66, then the area code without the 0.

Mobile Numbers Start with 8 or 9

Thai mobile numbers begin with 8 or 9 after the country code. These are typically 10 digits total (including the country code).

Bangkok Numbers Use Area Code 2

Bangkok landlines use area code 2 and are typically 8 digits after the area code. Dial +66 2 XXXX XXXX when calling Bangkok from Japan.

Use the Full Country Code (+66) for International Calls

Even if you're using a service that displays numbers differently, the country code +66 is the international standard for Thailand.

TIMING & TIPS

Best Times to Call Thailand from Japan

Thailand is 2 hours behind Japan year-round. Plan your calls strategically to reach people during business or comfortable hours.

Time & windows

Morning in Japan

8:00 AM – 12:00 PM JST

6:00 AM – 10:00 AM ICT (early morning in Thailand; avoid unless urgent)

Business Hours (Both Countries)

1:00 PM – 5:00 PM JST

11:00 AM – 3:00 PM ICT (good time for business calls)

Evening in Japan

6:00 PM – 9:00 PM JST

4:00 PM – 7:00 PM ICT (late afternoon in Thailand; still within business hours)

🇯🇵Japan Noon

12:00 PM JST = 10:00 AM ICT (Thailand)Mid-morning in Thailand; acceptable for business

🇯🇵Japan Evening

7:00 PM JST = 5:00 PM ICT (Thailand)Early evening in Thailand; good for personal calls

🇯🇵Japan Midnight

12:00 AM JST = 10:00 PM ICT (Thailand)Late evening in Thailand; avoid

Calling tips

Thailand observes Indochina Time (ICT) year-round; there is no daylight saving time.
Japan Standard Time (JST) is also fixed year-round, so the 2-hour difference is consistent all year.
Mid-morning to mid-afternoon (Thailand time) is ideal for business calls.
Mobile calls to Thailand may take a few seconds to connect; allow the call to ring for at least 15–20 seconds.
Network congestion during peak hours (6–9 PM Thailand time) may affect call clarity; plan important calls earlier.

Business etiquette

Thais typically appreciate politeness and avoid abrupt conversation starters; begin with a greeting.
Business calls are best scheduled in advance when possible.
Morning (8–11 AM ICT) is preferred for initial business contact in Thailand.
Avoid calling before 7 AM or after 8 PM Thailand time unless the contact expects it.

Sources

1
TimeandDate.com – Japan to Thailand Time Difference
Confirms consistent 2-hour time difference (Japan Standard Time vs. Indochina Time)

TROUBLESHOOTING

Troubleshooting & Known Issues

Common issues and how to resolve them when calling Thailand from Japan.

Call Fails to Connect

Ensure you have dialed the full international number: 010 66 [area code without 0] [local number]. If the call still fails, check your internet connection (for VoIP) or phone signal. Some landline carriers may not support certain Thailand area codes; contact your provider if the issue persists.

Poor Audio Quality or Drops

International calls can be affected by network congestion, especially during peak hours. Try calling at a different time, or ensure you have a strong internet connection. Switching to a wired connection (if using VoIP) can improve stability.

Higher Than Expected Cost

Verify the rate with your calling service before placing the call. Sayfone shows transparent per-minute rates ($0.18/min to Thailand) with transparent pricing. Some mobile carriers apply additional international charges; confirm with your carrier if not using Sayfone.

Number Format Not Accepted

Always use the international format: +66 or 010 66, followed by the area code without the leading 0. Some Thai numbers may have variable lengths; if a number doesn't work, try removing any spaces or dashes and re-entering it.

Sources

1
International Telecommunication Union – Mobile International Roaming
General reference for international roaming and connectivity issues

Savings

See what you could save

Adjust the tools below to compare Sayfone with typical retail pricing for calls to Thailand. Start with one call, then layer on monthly volume to see the bigger picture.

How to use these tools

Sayfone uses your live rate for calls to Thailand — the same basis as the rest of this page.
First, estimate savings on a single call length. Then, model a full month of minutes versus typical retail benchmarks.
Retail competitor rows are illustrative — not a quote from any carrier.