THAILAND (TH)

Locale Summary

Locale name	Thailand
ISO code	TH
Region	Asia
Mobile country code	520
Dialing code	+66

Guidelines

Two-way SMS supported	No
Number portability available	Yes
Twilio concatenated message support	Yes
Message length	160 Characters
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.
Compliance considerations	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. Thailand's telecom regulator has very strict regulations about the type of SMS content which can be sent to mobile subscribers. They may impose heavy fines and cut off connections if these rules are breached. Customers that send messages to Thailand must follow all applicable laws and regulations and must avoid sending content that is associated with pornography, politics, religion, gambling, and money. Twilio strongly encourages customers to review proposed use cases with qualified legal counsel to make sure that they comply with all applicable laws. The following are some general best practices: Get opt-in consent from each end-user before sending any communication to them, particularly for marketing or other non-essential communications. Only communicate during an end-user’s daytime hours unless it is urgent. SMS campaigns should support HELP/STOP messages, and similar messages, in the end-user’s local language. Do not contact end-users on do-not-call or do-not-disturb registries.

Phone Numbers & Sender ID

	Alphanumeric		Long Code		Short Code
	Pre-registration	Dynamic	Domestic	International
Operator network capability	Required	Not Supported	Supported	Not Supported	Not Supported
Twilio supported	Required Learn more	Not Supported	Not Supported	Supported	Not Supported
Sender ID preserved	Yes	---	---	No	---
Provisioning time	2 weeks	N/A	N/A	N/A	N/A
UCS-2 support	Supported	N/A	N/A	N/A	N/A
Use case restrictions	Customers who intend to register and send loan related content must be able to provide a license from the Bank Of Thailand.	N/A	N/A	Delivery of messages submitted with Numeric Sender IDs is on a best-effort basis and will be overwritten with a random Numeric or Alphanumeric Sender IDs. Pre-registration of Alphanumeric Sender IDs is required.	N/A
Best practices	Local network operators tend to deactivate Sender IDs which were registered in the past but are not used for a considerable period of time. We suggest our clients make sure that they keep sending traffic periodically to the specific destination once they register their Alpha Sender IDs. If the Sender ID is deactivated due to inactivity then the customer needs to reinitiate the registration procedure.	N/A	N/A	N/A	N/A

	Alphanumeric - Pre-registration
Operator network capability	Required
Twilio supported	Required Learn more
Sender ID preserved	Yes
Provisioning time	2 weeks
UCS-2 support	Supported
Use case restrictions	Customers who intend to register and send loan related content must be able to provide a license from the Bank Of Thailand.
Best practices	Local network operators tend to deactivate Sender IDs which were registered in the past but are not used for a considerable period of time. We suggest our clients make sure that they keep sending traffic periodically to the specific destination once they register their Alpha Sender IDs. If the Sender ID is deactivated due to inactivity then the customer needs to reinitiate the registration procedure.

	Alphanumeric - Dynamic
Operator network capability	Not Supported
Twilio supported	Not Supported
Sender ID preserved	---
Provisioning time	N/A
UCS-2 support	N/A
Use case restrictions	N/A
Best practices	N/A

	Long Code - Domestic
Operator network capability	Supported
Twilio supported	Not Supported
Sender ID preserved	---
Provisioning time	N/A
UCS-2 support	N/A
Use case restrictions	N/A
Best practices	N/A

	Long Code - International
Operator network capability	Not Supported
Twilio supported	Supported
Sender ID preserved	No
Provisioning time	N/A
UCS-2 support	N/A
Use case restrictions	Delivery of messages submitted with Numeric Sender IDs is on a best-effort basis and will be overwritten with a random Numeric or Alphanumeric Sender IDs. Pre-registration of Alphanumeric Sender IDs is required.
Best practices	N/A

	Short Code
Operator network capability	Not Supported
Twilio supported	Not Supported
Sender ID preserved	---
Provisioning time	N/A
UCS-2 support	N/A
Use case restrictions	N/A
Best practices	N/A

For the benefit of all our customers, these guidelines are provided to help you comply with applicable requirements and to help ensure Twilio's platform remains compliant with global telecommunications ecosystem requirements. These guidelines represent our current understanding of common compliance requirements generally applicable to Twilio and its customers, and do not constitute legal advice. By posting these guidelines, Twilio makes no assurances regarding the legal compliance of your application built using our APIs. You are expected to understand and abide by all compliance obligations applicable to your specific application. You should check these pages regularly for updates as telecommunications ecosystem requirements continue to evolve and change, and the information below may be updated or changed without notice.