[Sip] Recent List of all SIP headers in IANA registry

["Vasudeva M" <vasudeva.manjunath at gmail.com>]

Hi All,

I wanted to know whether there is ANY Central place to see currently IANA Registered SIP Headers...
I checked out rfc3968 which gives all the SIP Headers in IANA Registry.
The RFC was itself published in 2004. I could not find any other update to this RFC.

I would like to get the Latest list of all the SIP Headers in the IANA registry and the corresponding RFCs/drafts...
Any pointers would be really helpful. (google didn't help much though...)

Thanks and Best Regards,
Vasu
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