These entries are queried from radb.net using whois, you can try my project getting these.
:AS21600 route: 198.17.139.0/24 descr: Logistics Management Resources, Inc. Baton Rouge. La. origin: AS21600 mnt-by: MNT-LRM-8 changed: chris [at] lmri.com 20130429 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source