These entries are queried from radb.net using whois, you can try my project getting these.
:AS394271 route: 157.246.0.0/16 descr: Proxy route-object for Springfield Public Schools origin: AS394271 mnt-by: MAINT-AS3701 changed: rhicks [at] nero.net 20160101 #21:40:16Z source: RADB last-modified: 2023-11-13T15:48:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2620:3e::/48 descr: Proxy route-object for Springfield Public Schools origin: AS394271 mnt-by: MAINT-AS3701 changed: rhicks [at] nero.net 20160101 #21:42:13Z source: RADB last-modified: 2023-11-13T15:48:30Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source