Country Summary

Country nameChina
ISO codeCN
RegionAsia
Mobile country code460
Dialing code+86
Major carriersChina Mobile, China Unicom, China Telecom

Guidelines

Two-way SMS supported No
Twilio concatenated message supportYes
Message length-----
Twilio MMS supportNot Available
Sending SMS to landline numbersYou 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

Delivery of promotional messages is on a best-effort basis because mobile operators in China are actively blocking and filtering. Messages may be subjected to manual review to screen for prohibited content and messages with certain new keywords may be blocked/filtered without warning. This practice can delay delivery of messages for up to 24 hours in some cases. This review/filtering happens downstream from Twilio, and Twilio does not have control of this process. You can whitelist transactional messages to achieve higher delivery rates and potentially minimize delay.

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, 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 & Sender ID

PreregisteredAlphanumericLong CodeShort Code
Operator network capabilityNot RequiredNot SupportedNot SupportedNot Supported
Twilio supportedNot RequiredNot SupportedSupportedNot Supported
Sender ID preserved --- --- No ---
Provisioning time--------
UCS-2 support --------
Use case restrictions --Not Applicable--Not Applicable
Best practices --Not ApplicableYou may use a global SMS-capable number to reach mobile phones in China. Sender IDs are overwritten with 106 channel numbers.No Applicable
Preregistered
Operator network capabilityNot Required
Twilio supportedNot Required
Sender ID preserved ---
Provisioning time--
UCS-2 support --
Use case restrictions --
Best practices --
Alphanumeric
Operator network capabilityNot Supported
Twilio supportedNot Supported
Sender ID preserved ---
Provisioning time--
UCS-2 support --
Use case restrictions Not Applicable
Best practices Not Applicable
Long Code
Operator network capabilityNot Supported
Twilio supportedSupported
Sender ID preservedNo
Provisioning time--
UCS-2 support --
Use case restrictions --
Best practices You may use a global SMS-capable number to reach mobile phones in China. Sender IDs are overwritten with 106 channel numbers.
Short Code
Operator network capabilityNot Supported
Twilio supportedNot Supported
Sender ID preserved ---
Provisioning time--
UCS-2 support --
Use case restrictions Not Applicable
Best practices No Applicable

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.