Dear colleagues,

Currently, Whois query does not support the "sponsoring-org:" attribute in an inverse query, i.e. to find all resources sponsored by an organisation.

The "sponsoring-org:' attribute was added to the RIPE database in these policies, but there's no mention of support for inverse queries:

2012-08: https://www.ripe.net/membership/policies/proposals/2012-08/
2014-06: https://www.ripe.net/membership/policies/proposals/2014-06/

If there is no objection, I propose for consistency to also add "sponsoring-org:" to the list of inverse query attributes.

Regards
Ed Shryane
RIPE NCC