These entries are queried from radb.net using whois, you can try my project getting these.
:AS18596 route: 66.242.192.0/19 origin: AS18596 descr: PO 29 21668 Double Arch Dr Staunton IL 62088 United States member-of: RS-MADT admin-c: GHO34-ARIN tech-c: JB1300-ARIN tech-c: JDA66-ARIN mnt-by: MNT-MADT created: 2022-01-11T17:19:49Z last-modified: 2022-01-11T17:19:49Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 76.77.224.0/20 origin: AS18596 descr: PO 29 21668 Double Arch Dr Staunton IL 62088 United States member-of: RS-MADT admin-c: GHO34-ARIN tech-c: JB1300-ARIN tech-c: JDA66-ARIN mnt-by: MNT-MADT created: 2022-01-11T17:20:51Z last-modified: 2022-01-11T17:20:51Z source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source