These entries are queried from radb.net using whois, you can try my project getting these.
:AS53421 route: 199.244.16.0/21 descr: RR-RC-Troy City School District-SWOH origin: AS53421 mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20181017 #22:02:30Z source: RADB last-modified: 2023-11-13T16:15:17Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 199.244.24.0/23 descr: RR-RC-Troy City School District-SWOH origin: AS53421 mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20181017 #22:02:30Z source: RADB last-modified: 2023-11-13T16:15:17Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source