When you provision a Realtime Database instance, you must choose a location for the instance. To reduce latency and increase availability, store your data close to the users and services that need it.
If your project is on the pay-as-you-go Blaze pricing plan, then you can optionally create multiple databases in your project, each with its own location setting.
Be aware that once you provision a database instance, you cannot change its location setting.
In the following table, find the supported locations for Realtime Database instances along with their associated database URL formats.
| Region name | Region description | Database URL format | 
|---|---|---|
| us-central1 | Iowa |  DATABASE_NAME 
.firebaseio.com | 
| europe-west1 | Belgium |  DATABASE_NAME 
.europe-west1.firebasedatabase.app | 
| asia-southeast1 | Singapore |  DATABASE_NAME 
.asia-southeast1.firebasedatabase.app | 

