These entries are queried from radb.net using whois, you can try my project getting these.
:AS393307 route: 162.252.228.0/22 descr: COOPER UNIVERSITY HOSPITAL origin: AS393307 mnt-by: MAINT-AS27506 changed: mahmed [at] lightower.com 20140707 source: RADB last-modified: 2023-11-13T15:46:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 162.252.228.0/23 descr: COOPER UNIVERSITY HOSPITAL origin: AS393307 mnt-by: MAINT-AS27506 changed: mahmed [at] lightower.com 20140707 source: RADB last-modified: 2023-11-13T15:46:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 165.252.228.0/22 descr: LIGHTOWER - COOPER UNIVERSITY HOSPITAL origin: AS393307 mnt-by: MAINT-AS27506 changed: dataoperations [at] sidera.net 20140418 #14:09:12Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source