These entries are queried from radb.net using whois, you can try my project getting these.
:AS18557 route: 64.63.192.0/18 descr: Proxy route for ViaWest customer. origin: AS18557 remarks: VW-CUST-87447 mnt-by: MAINT-FLEXENTIAL changed: routing [at] viawest.net 20131108 #01:10:11Z source: RADB last-modified: 2023-11-13T15:57:06Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 65.38.224.0/19 descr: Proxy route for ViaWest customer. origin: AS18557 remarks: VW-CUST-87447 mnt-by: MAINT-FLEXENTIAL changed: routing [at] viawest.net 20131108 #01:09:27Z source: RADB last-modified: 2023-11-13T15:57:06Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source