These entries are queried from radb.net using whois, you can try my project getting these.
:AS54573 route: 63.232.206.0/24 descr: RR-RC-GTECH Corporation-Austin origin: AS54573 notify: publicipaddressing [at] charter.com mnt-by: MAINT-RR changed: publicipaddressing [at] charter.com 20181017 #22:02:30Z source: RADB last-modified: 2023-11-13T16:15:02Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 160.20.248.0/24 descr: IGT-PRODUCTION-US origin: AS54573 mnt-by: MNT-FINOFFICE mnt-routes: MNT-FINOFFICE mnt-lower: MNT-FINOFFICE created: 2021-04-22T12:52:58Z last-modified: 2021-04-22T12:52:58Z source: RIPE remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 160.20.249.0/24 descr: IGT-PRODUCTION-US origin: AS54573 mnt-by: MNT-FINOFFICE mnt-routes: MNT-FINOFFICE mnt-lower: MNT-FINOFFICE created: 2021-04-22T12:54:28Z last-modified: 2021-04-22T12:54:28Z source: RIPE remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 160.238.61.0/24 descr: IGT-PRODUCTION-US origin: AS54573 mnt-by: MNT-FINOFFICE mnt-routes: MNT-FINOFFICE mnt-lower: MNT-FINOFFICE created: 2021-04-27T14:13:00Z last-modified: 2021-04-27T14:13:00Z source: RIPE remarks: **************************** remarks: * THIS OBJECT IS MODIFIED remarks: * Please note that all data that is generally regarded as personal remarks: * data has been removed from this object. remarks: * To view the original object, please query the RIPE Database at: remarks: * http://www.ripe.net/whois remarks: **************************** rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 204.214.50.0/24 descr: IGT GTECH origin: AS54573 mnt-by: MAINT-AS27506 changed: yikehara [at] lightower.com 20190402 source: RADB last-modified: 2023-11-13T15:55:46Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source