These entries are queried from radb.net using whois, you can try my project getting these.
:AS13471 route: 192.157.74.0/23 descr: Proxy Registration for PFS Web by Digital Realty origin: AS13471 mnt-by: MAINT-TELX changed: ipadmin [at] telx.com 20210826 source: ALTDB rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.157.74.0/23 descr: RR-RC-PFS Web-Austin origin: AS13471 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: 192.157.74.0/24 descr: RR-RC-PFS Web-Austin origin: AS13471 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: 192.157.75.0/24 descr: RR-RC-PFS Web-Austin origin: AS13471 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