I am the assigned Gen-ART reviewer for this draft. The General Area Review Team (Gen-ART) reviews all IETF documents being processed by the IESG for the IETF Chair. Please treat these comments just like any other last call comments. For more information, please see the FAQ at . Document: draft-ietf-sipcore-locparam-04 Reviewer: Ines Robles Review Date: 2020-01-26 IETF LC End Date: 2020-01-27 IESG Telechat date: Not scheduled for a telechat Summary: This document proposes for SIP protocol, a new geolocation parameter, the location-source ("loc-src"), so that an entity adding the locationValue to Geolocation header field can identify itself using its hostname. The document does not present major issues. I have some minor questions/suggestions at the end. Major issues: Not found Minor issues: Not found Nits/editorial comments: Section 4: "A UA MUST..." it would be nice to expand UA "A User Agent (UA) MUST..." Questions/Suggestions: 1- Section 1: I think it would be nice to add explicitly "This document updates 6442 by extending the Geolocation header field..." 2- Section 3: where it states "There are various architectures defined f...Each has it own characteristics with corresponding pros and cons...." I think it would be nice to add a reference/s to it. 3- Which Geolocation-Error codes correspond to the situation when the "loc-scr" field presents some error, or one LocationValue presents two "loc-src" fields and the locationValue in both cases is correct? Thank you for this document, Ines.