How can I check which region my Neon project is running in?

Check the Settings widget on the Project Dashboard in the Console, run neon projects get <project_id> in the CLI, or read the region from your connection string hostname. The API returns it too.

Console

Open the Neon Console and select the project.
On the Project Dashboard, find the Settings widget.
The region is listed there, including the provider (AWS, or Azure for older projects in the deprecated Azure regions).

See Project settings.

CLI

The projects list and projects get commands both show a Region Id column.

neon projects list

┌────────────────────────┬──────────┬───────────────┬──────────────────────┐
│ ID                     │ Name     │ Region ID     │ Created At           │
├────────────────────────┼──────────┼───────────────┼──────────────────────┤
│ crimson-voice-12345678 │ frontend │ aws-us-east-2 │ 2024-04-15T11:17:30Z │
└────────────────────────┴──────────┴───────────────┴──────────────────────┘

Or for a specific project:

neon projects get crimson-voice-12345678

See neon projects get.

Connection string

The hostname in your connection string includes the region. For example:

postgresql://alex:AbC123dEf@ep-cool-darkness-a1b2c3d4-pooler.us-east-2.aws.neon.tech/dbname?sslmode=require&channel_binding=require

The segment just before .aws.neon.tech (or .azure.neon.tech on Azure projects) is the region:

us-east-2.aws.neon.tech → AWS US East (Ohio)
eu-central-1.aws.neon.tech → AWS Europe (Frankfurt)
ap-southeast-1.aws.neon.tech → AWS Asia Pacific (Singapore)
eastus2.azure.neon.tech → Azure East US 2 (deprecated; no new projects)

The ep-cool-darkness-a1b2c3d4 portion is the compute endpoint ID, and -pooler marks a pooled connection. Neither tells you the region. The Regions page lists every region ID.

All branches share the project's region

You can't run different branches in different regions. To find where a branch's data lives, look up its project's region.

API

To get the region programmatically, call the Neon API:

curl "https://console.neon.tech/api/v2/projects/$PROJECT_ID" \
  -H "Authorization: Bearer $NEON_API_KEY" \
  -H "Accept: application/json" | jq '.project.region_id'

The region_id field uses the same IDs as the CLI, such as aws-us-east-2 (or azure-eastus2 for an existing Azure project). New projects can only be created in AWS regions.