# Determining DB instance class support in Amazon Web Services Regions
To determine the DB instance classes supported by each DB engine in a specific Amazon Web Services Region, you can take one of several approaches. You can use the Amazon Web Services Management Console, the [Amazon RDS Pricing](https://www.amazonaws.cn/rds/pricing/) page, or the [describe-orderable-db-instance-options](https://docs.amazonaws.cn/cli/latest/reference/rds/describe-orderable-db-instance-options.html) Amazon CLI command.
**Note**
When you perform operations with the Amazon Web Services Management Console, it automatically shows the supported DB instance classes for a specific DB engine, DB engine version, and Amazon Web Services Region. Examples of the operations that you can perform include creating and modifying a DB instance.
**Contents**
+ [Using the Amazon RDS pricing page to determine DB instance class support in Amazon Web Services Regions](#Concepts.DBInstanceClass.RegionSupportAurora.PricingPage)
+ [Using the Amazon CLI to determine DB instance class support in Amazon Web Services Regions](#Concepts.DBInstanceClass.RegionSupportAurora.CLI)
+ [Listing the DB instance classes that are supported by a specific DB engine version in an Amazon Web Services Region](#Concepts.DBInstanceClass.RegionSupportAurora.CLI.Example1)
+ [Listing the DB engine versions that support a specific DB instance class in an Amazon Web Services Region](#Concepts.DBInstanceClass.RegionSupportAurora.CLI.Example2)
## Using the Amazon RDS pricing page to determine DB instance class support in Amazon Web Services Regions
You can use the [Amazon Aurora Pricing](https://www.amazonaws.cn/rds/pricing/) page to determine the DB instance classes supported by each DB engine in a specific Amazon Web Services Region.
**To use the pricing page to determine the DB instance classes supported by each engine in a Region**
1. Go to [Amazon Aurora Pricing](https://www.amazonaws.cn/rds/aurora/pricing/).
1. Choose an Amazon Aurora engine in the **Amazon Pricing Calculator** section.
1. In **Choose a Region**, choose an Amazon Web Services Region.
1. In **Cluster Configuration Option**, choose a configuration option.
1. Use the section for compatible instances to view the supported DB instance classes.
1. (Optional) Choose other options in the calculator, and then choose **Save and view summary** or **Save and add service**.
## Using the Amazon CLI to determine DB instance class support in Amazon Web Services Regions
You can use the Amazon CLI to determine which DB instance classes are supported for specific DB engines and DB engine versions in an Amazon Web Services Region.
To use the Amazon CLI examples following, enter valid values for the DB engine, DB engine version, DB instance class, and Amazon Web Services Region. The following table shows the valid DB engine values.
****
| Engine name | Engine value in CLI commands | More information about versions |
| --- | --- | --- |
| MySQL 5.7-compatible and 8.0-compatible Aurora | `aurora-mysql` | [ Database engine updates for Amazon Aurora MySQL version 2](https://docs.amazonaws.cn/AmazonRDS/latest/AuroraMySQLReleaseNotes/AuroraMySQL.Updates.20Updates.html) and [ Database engine updates for Amazon Aurora MySQL version 3](https://docs.amazonaws.cn/AmazonRDS/latest/AuroraMySQLReleaseNotes/AuroraMySQL.Updates.30Updates.html) in the *Release Notes for Aurora MySQL* |
| Aurora PostgreSQL | `aurora-postgresql` | [https://docs.amazonaws.cn/AmazonRDS/latest/AuroraPostgreSQLReleaseNotes/Welcome.html](https://docs.amazonaws.cn/AmazonRDS/latest/AuroraPostgreSQLReleaseNotes/Welcome.html) |
For information about Amazon Web Services Region names, see [Amazon RegionsAvailability Zones](Concepts.RegionsAndAvailabilityZones.md#Concepts.RegionsAndAvailabilityZones.Regions).
The following examples demonstrate how to determine DB instance class support in an Amazon Web Services Region using the [describe-orderable-db-instance-options](https://docs.amazonaws.cn/cli/latest/reference/rds/describe-orderable-db-instance-options.html) Amazon CLI command.
**Topics**
+ [Listing the DB instance classes that are supported by a specific DB engine version in an Amazon Web Services Region](#Concepts.DBInstanceClass.RegionSupportAurora.CLI.Example1)
+ [Listing the DB engine versions that support a specific DB instance class in an Amazon Web Services Region](#Concepts.DBInstanceClass.RegionSupportAurora.CLI.Example2)
### Listing the DB instance classes that are supported by a specific DB engine version in an Amazon Web Services Region
To list the DB instance classes that are supported by a specific DB engine version in an Amazon Web Services Region, run the following command.
For Linux, macOS, or Unix:
```
aws rds describe-orderable-db-instance-options --engine {{engine}} --engine-version {{version}} \
--query "OrderableDBInstanceOptions[].{DBInstanceClass:DBInstanceClass,SupportedEngineModes:SupportedEngineModes[0]}" \
--output table \
--region {{region}}
```
For Windows:
```
aws rds describe-orderable-db-instance-options --engine {{engine}} --engine-version {{version}} ^
--query "OrderableDBInstanceOptions[].{DBInstanceClass:DBInstanceClass,SupportedEngineModes:SupportedEngineModes[0]}" ^
--output table ^
--region {{region}}
```
The output also shows the engine modes that are supported for each DB instance class.
For example, the following command lists the supported DB instance classes for version 13.6 of the Aurora PostgreSQL DB engine in US East (N. Virginia).
For Linux, macOS, or Unix:
```
aws rds describe-orderable-db-instance-options --engine aurora-postgresql --engine-version 15.3 \
--query "OrderableDBInstanceOptions[].{DBInstanceClass:DBInstanceClass,SupportedEngineModes:SupportedEngineModes[0]}" \
--output table \
--region us-east-1
```
For Windows:
```
aws rds describe-orderable-db-instance-options --engine aurora-postgresql --engine-version 15.3 ^
--query "OrderableDBInstanceOptions[].{DBInstanceClass:DBInstanceClass,SupportedEngineModes:SupportedEngineModes[0]}" ^
--output table ^
--region us-east-1
```
### Listing the DB engine versions that support a specific DB instance class in an Amazon Web Services Region
To list the DB engine versions that support a specific DB instance class in an Amazon Web Services Region, run the following command.
For Linux, macOS, or Unix:
```
aws rds describe-orderable-db-instance-options --engine {{engine}} --db-instance-class {{DB_instance_class}} \
--query "OrderableDBInstanceOptions[].{EngineVersion:EngineVersion,SupportedEngineModes:SupportedEngineModes[0]}" \
--output table \
--region {{region}}
```
For Windows:
```
aws rds describe-orderable-db-instance-options --engine {{engine}} --db-instance-class {{DB_instance_class}} ^
--query "OrderableDBInstanceOptions[].{EngineVersion:EngineVersion,SupportedEngineModes:SupportedEngineModes[0]}" ^
--output table ^
--region {{region}}
```
The output also shows the engine modes that are supported for each DB engine version.
For example, the following command lists the DB engine versions of the Aurora PostgreSQL DB engine that support the db.r5.large DB instance class in US East (N. Virginia).
For Linux, macOS, or Unix:
```
aws rds describe-orderable-db-instance-options --engine aurora-postgresql --db-instance-class db.r7g.large \
--query "OrderableDBInstanceOptions[].{EngineVersion:EngineVersion,SupportedEngineModes:SupportedEngineModes[0]}" \
--output table \
--region us-east-1
```
For Windows:
```
aws rds describe-orderable-db-instance-options --engine aurora-postgresql --db-instance-class db.r7g.large ^
--query "OrderableDBInstanceOptions[].{EngineVersion:EngineVersion,SupportedEngineModes:SupportedEngineModes[0]}" ^
--output table ^
--region us-east-1
```