These entries are queried from radb.net using whois, you can try my project getting these.
:AS10561 route: 129.64.0.0/16 origin: AS10561 mnt-by: MNT-BRANDE-Z descr: Brandeis University IPv4 class-B, Waltham MA campus tech-c: MF8-ARIN admin-c: ZB114-ARIN source: ARIN created: 2020-10-06T16:20:03Z last-modified: 2020-10-06T16:20:03Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 129.64.0.0/16 descr: Brandeis University MS017 415 South Street Waltham, MA 02453 US origin: AS10561 remarks: proxy-registered object for customer remarks: direct inquiries to hostmaster [at] brandeis.edu mnt-by: MAINT-AS6079 changed: stephen.griffin [at] rcn.com 20040323 source: RADB last-modified: 2023-11-13T15:39:34Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:470:1b8::/48 origin: AS10561 descr: NET-2001-470-1b8---48-AS10561 admin-c: ZH17-ARIN tech-c: ZH17-ARIN mnt-by: MNT-HURC source: ARIN created: 2023-09-26T01:45:13Z last-modified: 2023-09-26T01:45:13Z rpki-ov-state: valid