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    Regions and AZs

    Last updated: 2023-08-22 15:51:37
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      TencentDB data centers are hosted in multiple locations worldwide. These locations are known as regions. Each region contains multiple availability zones (AZs). Each region is an independent geographic area containing multiple isolated AZs. Separate AZs in the same region are connected via low-latency private networks. Tencent Cloud provides you with the ability to distribute Tencent Cloud resources across different locations. We recommend you place resources in different AZs to eliminate single points of failure which may lead to service unavailability.
      Region name and AZ name can most directly embody the coverage of a data center. The following naming convention is used for your convenience:
      A region name is composed of region + city. The region indicates the geographic area that the data center covers, while the city represents the city in or near which the data center is located.
      AZ names utilize the format of city + number.

      Regions

      Tencent Cloud regions are completely isolated. This guarantees the maximum cross-region stability and fault tolerance. When you purchase Tencent Cloud services, we recommend you select the region closest to your end users to minimize access latency and improve download speed. Operations such as launching or viewing instances are performed at the region level. Private network communication:
      Tencent Cloud resources in the same VPC within the same region under the same account can communicate with each other over private network. They can also be accessed at the private network access.
      The networks of different regions are fully isolated from each other, and Tencent Cloud services in different regions cannot communicate using private networks by default.
      Tencent Cloud services in different regions can communicate with each other through public IPs over the internet, while those in different VPCs can communicate with each other through Cloud Connect Network, which is faster and more stable.
      Cloud Load Balancer currently supports intra-region traffic forwarding and being bound to CVM instances in the same region by default. If you enable the cross-region binding feature, a CLB instance can be bound to CVM instances in another region.

      AZs

      AZs refer to Tencent Cloud's physical data centers that are in the same region. Each AZ is independently powered and have its own network resources. They are designed to ensure that failures within one AZ can be isolated from other AZs, thereby ensuring service availability and business stability and excepting the occurrences of large-scale disasters or major power failures. Users can protect their applications from being affected by failures that occur in a single location by selecting instances in independent AZs. When launching an instance, you can select any AZ in the specified region. For high reliability, you can adopt a cross-AZ deployment solution to ensure that the service remains available when an instance in a single location fails. Examples of such solutions include CLB and EIP.

      List of Regions and AZs

      China

      Region
      AZ
      South China (Guangzhou)
      ap-guangzhou
      Guangzhou Zone 4
      ap-guangzhou-4
      Guangzhou Zone 6
      ap-guangzhou-6
      Guangzhou Zone 7
      ap-guangzhou-7
      East China (Shanghai)
      ap-shanghai
      Shanghai Zone 2
      ap-shanghai-2
      Shanghai Zone 4
      ap-shanghai-4
      Shanghai Zone 5
      ap-shanghai-5
      North China (Beijing)
      ap-beijing
      Beijing Zone 3
      ap-beijing-3
      Beijing Zone 5
      ap-beijing-5
      Beijing Zone 6
      ap-beijing-6
      Beijing Zone 7
      ap-beijing-7
      North China (Beijing Finance)
      ap-beijing-fsi
      Beijing Finance Zone 1 (only financial institutions and enterprises can contact us to apply for activation)
      ap-beijing-fsi-1
      East China (Nanjing)
      ap-nanjing
      Nanjing Zone 1
      ap-nanjing-1
      Southwest China (Chengdu)
      ap-chengdu
      Chengdu Zone 1
      ap-chengdu-1
      Southwest China (Chongqing)
      ap-chongqing
      Chongqing Zone 1
      ap-chongqing-1
      Hong Kong/Macao/Taiwan (China Region) (Hong Kong, China)
      ap-hongkong
      Hong Kong Zone 2
      ap-hongkong-2
      Hong Kong Zone 3 ap-hongkong-3

      Other countries and regions

      Region
      AZ
      Southeast Asia Pacific (Singapore)
      ap-singapore
      Singapore Zone 3
      ap-singapore-3
      Singapore Zone 4
      ap-singapore-4
      West US (Silicon Valley)
      na-siliconvalley
      Silicon Valley Zone 1
      na-siliconvalley-1
      Silicon Valley Zone 2 na-siliconvalley-2
      Europe (Frankfurt)
      eu-frankfurt
      Frankfurt Zone 1
      eu-frankfurt-1
      Frankfurt Zone 2
      eu-frankfurt-2
      Northeast Asia (Seoul)
      ap-seoul
      Seoul Zone 2
      ap-seoul-2
      East US (Virginia)
      na-ashburn
      Virginia Zone 1
      na-ashburn-1
      Virginia Zone 2
      na-ashburn-2
      Northeast Asia (Tokyo)
      ap-tokyo
      Tokyo Zone 1
      ap-tokyo-1
      Tokyo Zone 2
      ap-tokyo-2

      Selection of Regions and AZs

      When you purchase Tencent Cloud services, we recommend you select the region closest to your end users to minimize access latency and improve download speed.
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