These entries are queried from radb.net using whois, you can try my project getting these.
:AS53462 route: 67.90.226.0/24 descr: Proxy Add for Charter Business Customer Kadlec Regional Medical origin: AS53462 mnt-by: MAINT-CHTR-WD changed: rob.beauvais [at] charter.com 20151022 #16:35:56Z source: RADB last-modified: 2023-11-13T16:11:26Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 198.22.194.0/24 descr: Kadlec Regional Medical Center origin: AS53462 mnt-by: MAINT-CHTR-WD changed: wendel.herron [at] chartercom.com 20100326 #18:34:06Z source: RADB last-modified: 2023-11-13T16:11:25Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source