China SIP trunk service is provided by Government Service Providers and third-party Service Providers.
Only China Telecom, China Unicom, and China Mobile have phone number resources in China, while other third-party service providers obtain numbers wholesale from these three major carriers.
Government Telecom Service Provider vs 3rd Internet Telecom Service Provider
Related Resources
📘 How to Get a China SIP Trunk Number — Step-by-step guide
🔧 Get Your SIP Trunk Service — Start the application process
China SIP Trunk Provider Ecosystem
Frequently Asked Questions
Q: Who can provide SIP DID numbers in China?
A: China Telecom, China Unicom, and China Mobile can provide SIP trunk. Some third-party providers can also offer SIP trunk.
Q: I do not have a local company in China. Can I get a SIP number?
A: Sorry, you cannot. According to Chinese law, all phone numbers must be registered under a local company.
Q: When I contact Telecom/Unicom, they tell me it takes many days to apply for SIP service.
A: We can help expedite the process using our resources, so you can use your SIP number as soon as possible.
Q: When I search the web, why is there so little information about China SIP?
A: Government SIP trunk services were opened in 2018. Also, SIP requires technical expertise, so only a few people are knowledgeable about it.
Q: The telecom provider gave me a list of SIP parameters. It is very complex, and I have no idea how to proceed.
A: You need to purchase an SBC device and configure it with the parameters provided. We can help you with the configuration.
Q: Can I forward a SIP line to a remote office?
A: With the CTS SIP server, you can forward local SIP lines to remote locations.
Q: How can I check the ownership of a number?
A: Call 10000 (Telecom), 10010 (Unicom), or 10086 (Mobile) to verify if the number belongs to you.
Ready to Get Your China SIP Trunk?
CTS helps you navigate both government and third-party SIP trunk providers.