These entries are queried from radb.net using whois, you can try my project getting these.
:AS20234 route: 198.51.225.0/24 descr: RR-RC-HNTB Corporation-Kansas City origin: AS20234 mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20181017 #22:02:30Z source: RADB last-modified: 2023-11-13T16:15:18Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.51.226.0/23 descr: RR-RC-HNTB Corporation-Kansas City origin: AS20234 mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20181017 #22:02:30Z source: RADB last-modified: 2023-11-13T16:15:18Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.51.228.0/23 descr: RR-RC-HNTB Corporation-Kansas City origin: AS20234 mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20181017 #22:02:30Z source: RADB last-modified: 2023-11-13T16:15:18Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source