These entries are queried from radb.net using whois, you can try my project getting these.
:AS64273 route: 23.183.128.0/24 descr: Orca Networking Services descr: 228 Appian Way descr: Union City, CA 94587 descr: US origin: AS64273 mnt-by: MNT-TH changed: terryh [at] orcas.net 20170627 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.172.244.0/24 descr: Orca Networking Services descr: 228 Appian Way descr: Union City, CA 94587 descr: US origin: AS64273 mnt-by: MNT-TH changed: terryh [at] orcas.net 20180305 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2620:22:e000::/48 descr: Orca Networking Services descr: 228 Appian Way descr: Union City, CA 94587 descr: US origin: AS64273 mnt-by: MNT-TH changed: terryh [at] orcas.net 20170627 source: ARIN rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source