SIP 410 Gone

What SIP 410 means

The number or extension existed once and has deliberately been withdrawn. It is a more informative version of a 404, and it usually means a number was ceased or an extension deleted rather than that anything is misconfigured.

Client error (4xx)
Sent by A server that knows the address has been withdrawn
Rare

What SIP 410 Gone actually means

The requested resource is no longer available at the server and the condition is expected to be permanent. Where a 404 says it is not here, a 410 says it was here and has gone, which tells you the address was valid once and the record you are working from is simply out of date.

What causes SIP 410 on a business phone system

The number has been ceasedA number given up rather than ported is withdrawn. Directories and marketing lists keep it alive long afterwards.
The extension was deletedOld speed dials and BLF keys keep pointing at extensions removed when someone left.

How to fix SIP 410

Update the record that produced the numberThe fault is in the directory rather than the phone system, so fix it at source or it will keep being dialled.
Clear stale references on handsetsTidy the speed dials, BLF keys and divert rules that still point at the withdrawn address.

Fixing the underlying problem

This page explains the code. These guides walk through the fix in detail.

Porting numbers to a VoIP system

Questions about SIP 410

What is the difference between SIP 410 and SIP 404?

A 404 means the address is not there, without saying whether it ever was. A 410 means it was there and has been deliberately withdrawn, which is a useful signal: the number you hold was once valid, so your records are out of date rather than wrong.

Call hangup causes that become SIP 410

If the call crossed a gateway between SIP and ISDN or SS7, this status may have started life as one of these Q.850 cause values. The mapping is defined in RFC 3398 section 7.2.4.1.

Related SIP response codes

Source. SIP 410 Gone is defined in RFC 3261 section 21.4.10 and registered in the IANA SIP Parameters — Response Codes. The causes and fixes above are drawn from our own experience supporting UK business phone systems.

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