Speaking on behalf of LACNIC, we will be rolling this feature for our
member portal in the second half of the year.
Also, I believe Job Snijders has been doing this for a while, at least
for some RPKI repos.
See: whois -h rr.whois.ntt.net 200.7.84.1
and dragon has been doing it for many years. but DO NOT USE IT, or any
of these, because
open source tools for this have been public for some years. also IRR
servers. but why would you trust an IRR server, when you can run one
of the tools, fetch RPKI data (which you can trust if you have well-
configured trust anchors), and create your own, trustable, IRR hack?
randy