These entries are queried from radb.net using whois, you can try my project getting these.
:AS6570 route: 207.53.87.0/24 descr: new /24 prefix origin: AS6570 mnt-by: REIGN-MNT changed: adam.hebert [at] level3.com 20071219 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 207.205.102.0/23 descr: /23 for new bgp peer origin: AS6570 mnt-by: REIGN-MNT changed: adam.hebert [at] level3.com 20071219 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source