1. API Description

Domain name for API request: vpc.tencentcloudapi.com.

This API is used to create a subnet.

• You must create a VPC instance before creating a subnet.
• After the subnet is successfully created, its IP address range cannot be modified. The subnet IP address range must fall within the VPC IP address range. They can be the same if the VPC instance has only one subnet. We recommend that you keep the subnet IP address range within the VPC IP address range to reserve IP address ranges for other subnets.
• The subnet mask of the smallest IP address range that can be created is 28 (16 IP addresses), and that of the largest IP address range is 16 (65,536 IP addresses).
• IP address ranges of different subnets cannot overlap with each other within the same VPC instance.
• A subnet is automatically associated with the default route table once created.
• You can bind a tag when creating a subnet. The tag list in the response indicates the tags that have been successfully added.

A maximum of 100 requests can be initiated per second for this API.

Note: This API supports Finance regions. If the common parameter Region is a Finance region, a domain name with the Finance region needs to be specified, for example: vpc.ap-shanghai-fsi.tencentcloudapi.com

2. Input Parameters

The following request parameter list only provides API request parameters and some common parameters. For the complete common parameter list, see Common Request Parameters.

3. Output Parameters

4. Example

Example1 Creating a subnet

Input Example

https://vpc.tencentcloudapi.com/?Action=CreateSubnet
&Version=2017-03-12
&VpcId=vpc-m3ul053f
&SubnetName=TestSubnet
&CidrBlock=10.8.0.0/16
&Zone=ap-guangzhou-1
&Tags.0.Key=city
&Tags.0.Value=shanghai
&<Common request parameters>

Output Example

{
  "Response": {
    "RequestID": "354f4ac3-8546-4516-8c8a-69e3ab73aa8a",
    "Subnet": {
      "VpcId": "vpc-m3ul053f",
      "IsDefault": false,
      "SubnetName": "TestSubnet",
      "Zone": "ap-guangzhou-1",
      "SubnetId": "subnet-2qhl25io",
      "CidrBlock": "10.8.255.0/24",
      "TotalIpAddressCount": 253,
      "AvailableIpAddressCount": 253,
      "TagSet": [
        {
          "Key": "city",
          "Value": "shanghai"
        }
      ]
    }
  }
}

5. Developer Resources

API Explorer

This tool allows online call, signature authentication, SDK code generation and quick search of APIs to greatly improve the efficiency of using TencentCloud APIs.

• API 3.0 Explorer

SDK

TencentCloud API 3.0 integrates SDKs that support various programming languages to make it easier for you to call APIs.

• Tencent Cloud SDK 3.0 for Python
• Tencent Cloud SDK 3.0 for Java
• Tencent Cloud SDK 3.0 for PHP
• Tencent Cloud SDK 3.0 for Go
• Tencent Cloud SDK 3.0 for NodeJS
• Tencent Cloud SDK 3.0 for .NET

Command Line Interface

• Tencent Cloud CLI 3.0

6. Error Code

The following only lists the error codes related to the API business logic. For other error codes, see Common Error Codes.