---
page_type: error
code: 31904
message: "31904: Stream - WebSocket - Host Unreachable"
level: ERROR
product: Programmable Voice
---

## Description

The WebSocket connection cannot be created because the server is unreachable.

### Possible Causes

- Wrong IP address or DNS name
- IP address belongs to the private domain and it is non-routable
- Host is down or disconnected from router

### Possible Solutions

- Validate the IP address or DNS names are valid and belongs to the public domain
- Validate the host is running and properly connected to the Internet