# Sandbox Doorking Callboxes

Use the following set of credentials to add virtual Doorking callboxes to your Seam [sandbox workspace](https://docs.seam.co/latest/~/revisions/DFdrUdS2jQOnbJTNDT5a/core-concepts/workspaces#sandbox-workspaces):

| Serial Number | Phone Number | Master Code | Tone Open Number |
| ------------- | ------------ | ----------- | ---------------- |
| fake-serial   | +18888888888 | 123456      | 1                |