These entries are queried from radb.net using whois, you can try my project getting these.
:AS21567 route: 64.152.74.0/24 descr: blue-silicon route origin: AS21567 mnt-by: BLUESILICON-MNT changed: carl.pluim [at] level3.com 20010719 source: LEVEL3 rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 174.70.16.0/24 origin: AS21567 descr: MTC1 remarks: Proxy object for AS21567 mnt-by: MAINT-AS22773 changed: cciatl-nocengineer [at] cox.com 20220513 source: RADB last-modified: 2023-11-13T16:11:05Z rpki-ov-state: valid