> For the complete documentation index, see [llms.txt](https://docs.deltastream.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.deltastream.io/overview/core-concepts/region.md).

# Region

A **region** specifies the cloud and cloud region from where you access your streaming stores (such as Apache Kafka and AWS Kinesis), and is also where DeltaStream runs its queries.

When you create a DeltaStream [store](/overview/core-concepts/store.md), you must specify an `access_region`. All [queries](/overview/core-concepts/queries.md) that use the store run in the specified `access_region`. It is possible to use an `access_region` that differs from the cloud/region hosting the database. But this incurs additional cost and latency due to cross-region traffic.

Here's an example: When you create an MSK store, if you specify `us-west-1` as the access region, all the queries in DeltaStream that read and write from this store run in the `us-west-1` region.

For a list of supported `access_regions,` use the [SHOW REGIONS](broken://pages/dqmTShTXTtD4hHXCMHxo) command.