Thailand
Name

Thailand

ISO Code

TH

Region

Asia

Mobile Country Code

520

Dialing code

+66

Major carriers

DTAC, True Move, AIS

Guidelines for Thailand
Two-way SMS supported

No

Number portability available

Yes

Twilio MMS support

Converted to SMS with embedded URL

Sending SMS to landline numbers

You cannot send SMS to a landline destination number: the Twilio REST API will throw a 400 response with error code 21614, the message will not appear in the logs, and the account will not be charged.

Best practices

AIS in Thailand has a feature that prevents subscribers from receiving SMS from non-Thai numbers. Customers can opt out of this feature by dialing *137.

Twilio strongly encourages customers to review proposed use cases with qualified legal counsel to ensure they comply with all applicable laws. The following are some general best practices:

  1. Get opt-in consent from each end user before sending any communication to them, particular for marketing or other non-essential communications.
  2. Only communicate during an end user's daytime hours unless it is urgent.
  3. SMS campaigns should support HELP/STOP messages, and similar messages, in the end user's local language.
  4. Do not contact end users on do-not-call or do-not-disturb registries.
Phone Numbers and Sender ID
Preregistered
Operator network capability

Supported

Twilio supported

Use Case Dependent

Sender ID format

Alphanumeric

Sender ID preserved

Yes

Two-way support

No

Provisioning time

1 week

Cost
--
Throughput (messages per second)

10 messages/second

Use case restrictions

Only transactional traffic is allowed

Best practices

--

Alphanumeric
Operator network capability

Supported

Twilio supported

Supported

Sender ID format

Alphanumeric

Sender ID preserved

Yes

Two-way support

Not Supported

Provisioning time
--
Cost

0

Throughput (messages per second)

10 messages/second

Use case restrictions

--

Best practices

--

Long Code
Operator network capability

Available

Twilio supported

Not Supported

Sender ID format

--

Sender ID preserved

--

Two-way support

--

Provisioning time

--

Cost

--

Throughput (messages per second)

--

Use case restrictions

--

Best practices

--

Short Code
Operator network capability
--
Twilio supported

--

Sender ID format
--
Sender ID preserved
--
Two-way support
--
Provisioning time
--
Cost
--
Throughput (messages per second)
--
Use case restrictions
--
Best practices
--
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