These entries are queried from radb.net using whois, you can try my project getting these.
:AS18454 route: 141.224.0.0/17 origin: AS18454 descr: Augsburg University Minneapolis, MN admin-c: DJM133-ARIN tech-c: DJM133-ARIN mnt-by: MNT-AUGSBU-Z created: 2022-11-16T20:18:10Z last-modified: 2022-11-16T20:18:10Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 141.224.128.0/19 origin: AS18454 descr: Augsburg University Minneapolis, MN admin-c: DJM133-ARIN tech-c: DJM133-ARIN mnt-by: MNT-AUGSBU-Z created: 2022-11-16T20:17:13Z last-modified: 2022-11-16T20:17:13Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source