604
SIP
604 Does Not Exist Anywhere
The server has authoritative information that the user indicated in the Request-URI does not exist anywhere. Unlike 404, this is a definitive, global statement.
Quand vous voyez ce code
When the user definitively does not exist on any server in the network. The server has authoritative knowledge, not just local.
Comment résoudre
The user does not exist. Verify the SIP URI or phone number. Unlike 404, retrying on other servers will not help.
Spécification
Codes associés
Comparaisons
Comparer avec
Guides
401 Unauthorized vs 403 Forbidden: When to Use Each
Security & Authentication
SIP Response Codes: Understanding VoIP Call Flow
Real-Time Protocols
SIP Call Flow: Understanding Session Setup
Real-Time Protocols
WebRTC Signaling with SIP and WebSocket
Real-Time Protocols
RFC 3261: SIP Protocol Deep Dive
Protocol Deep Dives
TLS 1.3: Faster, Simpler, More Secure
Protocol Deep Dives
Glossaire
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Request Method (HTTP Verb)
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PBX (Private Branch Exchange)
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TLS Versions