Internet Assigned Numbers Authority Presence SRV Protocol Label Registry Created 2003-11-26 Last Updated 2009-04-06 Available Formats [IMG] XML [IMG] HTML [IMG] Plain text Registry included below * Presence SRV Protocol Labels Presence SRV Protocol Labels Registration Procedure(s) Specification Required Expert(s) Unassigned Reference [RFC3861] Available Formats [IMG] CSV Protocol Label Reference _sip [RFC5509] _xmpp [RFC3921] Licensing Terms