SIP 404 Not Found Error
The 404 Not Found error in SIP occurs when the server cannot find the destination or does not receive a response from the other party.
Common Causes of 404 Not Found
- Incorrect dialed number
- Invalid or missing dialing prefix
- Unsupported number format (e.g., using “+” when not allowed)
- Destination is unavailable or offline
- Issues on the receiving side (device off, overloaded, or under maintenance)
How to Fix 404 Not Found
- Double-check the destination number
- Verify correct dialing format and prefixes
- Remove special symbols if not supported
- Ensure the recipient is available
- Contact your provider to check routing or server issues
The SIP 404 Not Found error usually means the destination cannot be reached. It can often be resolved by correcting the dialed number or checking availability.