These entries are queried from radb.net using whois, you can try my project getting these.
:AS10990 route: 66.55.64.0/20 descr: Route update via web origin: AS10990 mnt-by: TULIXSYSTEMS-MNT changed: thomas.john [at] level3.com 20091009 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 207.126.160.0/21 descr: Tulix Systems origin: AS10990 remarks: Ticket 3687619 mnt-by: TULIXSYSTEMS-MNT changed: theodore.beasley [at] level3.com 20091002 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 207.126.162.0/23 descr: route update via web origin: AS10990 mnt-by: TULIXSYSTEMS-MNT changed: thomas.john [at] level3.com 20090611 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.75.224.0/21 descr: 208.75.224.0 origin: AS10990 mnt-by: TULIXSYSTEMS-MNT changed: chet.ng [at] level3.com 20100317 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.79.152.0/22 origin: AS10990 descr: 1002 Hemphill Ave NW Atlanta GA 30318 United States member-of: RS-AS10990 admin-c: GB1395-ARIN tech-c: GAM48-ARIN tech-c: GB1395-ARIN tech-c: MNT4-ARIN mnt-by: MNT-TULIX created: 2020-06-15T20:05:07Z last-modified: 2021-05-12T21:28:30Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 208.79.152.0/22 descr: Tulip Systems origin: AS10990 mnt-by: TULIXSYSTEMS-MNT changed: pam.basden [at] level3.com 20070703 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source