China (CN)

Locale name

China

ISO code
The International Organization for Standardization two character representation for the given locale.

CN

Region

Asia

Mobile country code
A three digit code associated with the given locale and used in conjunction with a Mobile Network Code to uniquely identify mobile networks.

460

Dialing code
The dialing prefix used to establish a call or send an SMS from one locale to the given locale.

+86

Two-way SMS supported
Whether Twilio supports two-way SMS in the given locale.

No

Number portability available
Whether number portability is available in the given locale.

No

Twilio concatenated message support
Concatenation refers to the capability of splitting a message that is too long to be sent in one SMS into smaller pieces and then joining the pieces at the receiving end so that the receiver sees the message as one. 

Yes*
For certain sender ID types this may not be supported. Where messages are split and rejoined may vary based on character encoding.

Message length
How many characters can be sent given a particular message encoding before the message will be split into concatenated segments.

We recommend a maximum of 500 characters or 8 segments for UCS2 encoding for better delivery rate.

Twilio MMS support
Multimedia Messaging Service (MMS) provides a standards-based means to send pictures and video to mobile phones.

Not Available

Sending SMS to landline numbers
How Twilio handles an SMS message destined for landline telephone number.

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
Twilio strongly encourages customers to review proposed use cases with qualified legal counsel to make sure that they comply with all applicable laws. This table lists some general best practices.

Chinese networks have very strict regulations about the type of SMS content which can be sent to subscribers on their network. The networks impose heavy fines and cut off connections if these rules are breached. Customers that send messages to, from, and within China must follow all applicable laws and regulations. Broadly speaking, China messaging restrictions do not allow URLs in the content, content that is political, illegal, pornographic, fraudulent, or finance-related, including but not limited to marketing content from banks or insurance companies, loans, credit cards, securities, stocks, crude oil, futures, gold, and cryptocurrency. Restrictions include messages that violate basic principles of the China Constitution, the Ministry of lndustry and Information Technology’s “Nine Prevention Rules”, and the Ministry of Public Security’s “Five categories”. 

Twilio is currently unable to ensure that messages sent to mainland China are reliably delivered because of restrictions around content, encoding, signatures, and use case. These restrictions have resulted in the blocking of seemingly legitimate and registered customer traffic. Due to this, Twilio is currently unable to support China message registration and messages sent through Twilio would be delivered on a best-effort basis with limited support only.

Promotional messages are not allowed to be submitted from 07:00 PM to 08:00 AM local time in China

Message delivery to M2M numbers is on best effort basis only.

General guidance

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:

1. Get opt-in consent from each end-user before sending any communication to them, particularly 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.

Operator network capability
Whether mobile operators in the given country support the feature.

Not Supported

Not Supported

Twilio supported
Whether Twilio supports the feature for the given country.

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Sender ID preserved
In some countries sender IDs for certain sender types are not preserved and are changed for compliance and/or deliverability reasons. In these countries mobile subscribers will see a different ‘from sender ID’ than the one sent by you.

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Provisioning time
Provisioning is the process of getting the sender ID approved and registered with mobile networks (depending on country requirements). Provisioning time is how long this process takes in the given country.

N/A

N/A

UCS-2 support

N/A

N/A

Use case restrictions

N/A

N/A

Best practices

N/A

N/A

Operator network capability
Whether mobile operators in the given country support the feature.

Not Supported

Not Supported

Not Supported

Twilio supported
Whether Twilio supports the feature for the given country.

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Supported

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Sender ID preserved
In some countries sender IDs for certain sender types are not preserved and are changed for compliance and/or deliverability reasons. In these countries mobile subscribers will see a different ‘from sender ID’ than the one sent by you.

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No

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Provisioning time
Provisioning is the process of getting the sender ID approved and registered with mobile networks (depending on country requirements). Provisioning time is how long this process takes in the given country.

N/A

N/A

N/A

UCS-2 support

N/A

Supported

N/A

Use case restrictions

N/A

N/A

N/A

Best practices

N/A

Generic signatures may be appended and Sender ID may deliver from random local longcodes.

N/A